1: pertaining to flowerless plants (ferns or mosses) in which growth occurs only at the tip of the main stem [syn: {acrogenous}]

1: pertaining to flowerless plants (ferns or mosses) in which growth occurs only at the tip of the main stem [syn: {acrogenic}]

1: a pungent colorless unsaturated liquid aldehyde made from propene [syn: {propenal}]

1: enlargement of bones of hands and feet and face; often accompanied by headache and muscle pain and emotional disturbances; caused by overproduction of growth hormone by the anterior pituitary gland...

1: having abnormal size with overgrown extremities resulting from abnormal pituitary secretion; "a protruding acromegalic jaw"; "a pituitary dwarf" [syn: {pituitary}]

1: enlargement of bones of hands and feet and face; often accompanied by headache and muscle pain and emotional disturbances; caused by overproduction of growth hormone by the anterior pituitary gland...

{acromion}

1: the outermost point of the spine of the shoulder blade [syn: {acromion}]

1: abnormally small extremities (underdeveloped fingers and toes) [syn: {acromikria}]

1: abnormally small extremities (underdeveloped fingers and toes) [syn: {acromicria}]

1: the outermost point of the spine of the shoulder blade [syn: {acromial process}] [also: {acromia} (pl)]

1: abnormal protrusion of the navel; sometimes the start of umbilical hernia

1: myotonia of the extremities only; causes spastic deformity of the hand or foot

1: a word formed from the initial letters of a multi-word name

1: characterized by the use of acronyms [syn: {acronymous}]

1: characterized by the use of acronyms [syn: {acronymic}]

1: of leaves or flowers; developing or opening in succession from base to apex [ant: {basipetal}]

1: a morbid fear of great heights

1: suffering from acrophobia; abnormally afraid of high places

1: naming a letter of the alphabet by using a word whose initial sound is the sound represented by that letter

1: the citadel in ancient Greek towns

1: coelenterate genus of order Madreporaria, including staghorn corals [syn: {genus Acropora}]

1: facing or on the side toward the apex [ant: {basiscopic}]

1: a process at the anterior end of a sperm cell that produces enzymes to facilitate penetration of the egg

1: placed crosswise; "spoken with a straight face but crossed fingers"; "crossed forks"; "seated with arms across" [syn: {crossed}] [ant: {uncrossed}] adv 1: to the opposite side; "the football field ...

1: including all; "we got a pay raise across the board"

1: extending throughout an entire nation; "nationally advertised"; "it was broadcast nationwide" [syn: {nationally}, {nationwide}, {across the nation}]

1: extending throughout an entire nation; "nationally advertised"; "it was broadcast nationwide" [syn: {nationally}, {nationwide}, {across the country}]

1: broad in scope or content; "across-the-board pay increases"; "an all-embracing definition"; "blanket sanctions against human-rights violators"; "an invention with broad applications"; "a panoptic s...

1: a puzzle where you fill a square grid with words reading the same down as across [syn: {word square}] 2: verse in which certain letters such as the first in each line form a word or message

1: in some classification systems placed in family Polypodiaceae [syn: {genus Acrostichum}]

1: stout tropical swamp fern (especially tropical America) having large fronds with golden yellow sporangia covering the undersides [syn: {golden fern}, {leather fern}]

1: a white crystalline amide of propenoic acid can damage the nervous system and is carcinogenic in laboratory animals; "they claimed that acrylamide is produced when certain carbohydrates are baked o...

1: a salt or ester of propenoic acid [syn: {propenoate}]

1: a glassy thermoplastic; can be cast and molded or used in coatings and adhesives [syn: {acrylic}, {acrylic resin}]

1: polymerized from acrylonitrile [syn: {acrylic fiber}] 2: a glassy thermoplastic; can be cast and molded or used in coatings and adhesives [syn: {acrylic resin}, {acrylate resin}] 3: used especially...

1: an unsaturated liquid carboxylic acid used in the manufacture of acrylic resins [syn: {propenoic acid}]

1: polymerized from acrylonitrile [syn: {acrylic}]

1: used especially by artists [syn: {acrylic}]

1: a glassy thermoplastic; can be cast and molded or used in coatings and adhesives [syn: {acrylic}, {acrylate resin}]

1: a colorless liquid unsaturated nitrile made from propene [syn: {propenonitrile}, {vinyl cyanide}]

1: a legal document codifying the result of deliberations of a committee or society or legislative body [syn: {enactment}] 2: something that people do or cause to happen [syn: {human action}, {human a...

1: function as or act like; "This heap of stones will act as a barrier" 2: pretend to have certain qualities or state of mind; "He acted the idiot"; "She plays deaf when the news are bad" [syn: {act},...

1: act in an uncontrolled manner [syn: {act reflexively}]

1: a natural and unavoidable catastrophe that interrupts the expected course of events; "he discovered that his house was not insured against acts of God" [syn: {force majeure}, {vis major}, {inevitab...

1: the calculated use of violence (or threat of violence) against civilians in order to attain goals that are political or religious or ideological in nature; this is done through intimindation or coe...

1: carry further or advance; "Can you act on this matter soon?" [syn: {pursue}, {follow up on}] 2: regulate one's behavior in accordance with certain information, ideas, or advice; "The Founding Fathe...

1: represent an incident, state, or emotion by action, especially on stage; "She could act neurotic anxiety" 2: act out; represent or perform as if in a play; "She reenacted what had happened earlier ...

1: act in an uncontrolled manner [syn: {act involuntarily}]

1: act like the master of; "He is lording it over the students" [syn: {lord it over}, {queen it over}, {put on airs}]

1: misbehave badly; act in a silly or improper way; "The children acted up when they were not bored" [syn: {carry on}] 2: make itself felt as a recurring pain; "My arthritis is acting up again"

1: have and exert influence or effect; "The artist's work influenced the young painter"; "She worked on her friends to support the political candidate" [syn: {influence}, {work}]

1: capable of being acted; suitable for the stage; "an actable scene" [ant: {unactable}]

1: baneberry [syn: {genus Actaea}]

1: North American herb with white poisonous berries [syn: {white baneberry}, {white cohosh}, {white bead}, {doll's eyes}]

1: North American perennial herb with alternately compound leaves and racemes of small white flowers followed by bright red oval poisonous berries [syn: {red baneberry}, {redberry}, {red-berry}, {snak...

1: a hormone produced by the anterior pituitary gland that stimulates the adrenal cortex [syn: {adrenocorticotropic hormone}, {adrenocorticotrophic hormone}, {adrenocorticotropin}, {adrenocorticotroph...

1: luna moths [syn: {genus Actias}]

1: large pale-green American moth with long-tailed hind wings and a yellow crescent-shaped mark on each fore wing [syn: {luna moth}]

1: trade name for a drug containing an antihistamine and a decongestant; used to treat upper respiratory conditions and minor allergies

1: one of the proteins into which actomyosin can be split; can exist in either a globular or a fibrous form

1: (of radiate organisms) located on the surface or end on which the mouth is situated [ant: {abactinal}]

1: sea anemones [syn: {Actiniaria}, {order Actiniaria}, {order Actinaria}]

1: serving temporarily especially as a substitute; "the acting president" [syn: {acting(a)}] n : the performance of a part or role in a drama [syn: {playing}, {playacting}, {performing}]

1: a (usually irritating) impulsive and uncontrollable outburst by a problem child or a neurotic adult 2: (psychiatry) the display of previously inhibited emotions (often in actions rather than words)...

1: a genus of sea anemone common in rock pools [syn: {genus Actinia}] 2: any sea anemone or related animal [syn: {actinian}, {actiniarian}]

{actinia}

1: any sea anemone or related animal [syn: {actinia}, {actiniarian}]

1: sea anemones [syn: {order Actiniaria}, {Actinaria}, {order Actinaria}]

1: any sea anemone or related animal [syn: {actinia}, {actinian}]

1: relating to or exhibiting actinism

1: dermatitis caused exposure to sunlight

1: an overgrowth of skin layers resulting from extended exposure to the sun

1: electromagnetic radiation that can produce photochemical reactions [syn: {actinic ray}]

1: electromagnetic radiation that can produce photochemical reactions [syn: {actinic radiation}]

1: any of a series of radioactive elements with atomic numbers 89 through 103 [syn: {actinoid}, {actinon}]

1: a series of 15 radioactive elements with increasing atomic numbers from actinium to lawrencium 2: (chemistry) a series from actinium to lawrencium of 15 radioactive elements with increasing atomic ...

1: small Asiatic woody vine bearing many-seeded fruit [syn: {genus Actinidia}]

1: high-climbing Asiatic vine having long finely serrate leaves and racemes of white flowers followed by greenish-yellow edible fruit [syn: {bower actinidia}, {tara vine}]

1: climbing vine native to China; cultivated in New Zealand for its fuzzy edible fruit with green meat [syn: {Chinese gooseberry}, {kiwi}, {kiwi vine}, {Actinidia deliciosa}]

1: climbing vine native to China; cultivated in New Zealand for its fuzzy edible fruit with green meat [syn: {Chinese gooseberry}, {kiwi}, {kiwi vine}, {Actinidia chinensis}]

1: ornamental vine of eastern Asia having yellow edible fruit and leaves with silver-white markings [syn: {silvervine}, {silver vine}]

1: tropical trees or shrubs or woody vines [syn: {family Actinidiaceae}]

1: terrestrial ferns of tropical Asia and Africa [syn: {genus Actiniopteris}]

1: the property of radiation that enables it to produce photochemical effects

1: a radioactive element of the actinide series; found in uranium ores [syn: {Ac}, {atomic number 89}]

1: having a radial form; "starfish are actinoid--that is, they are radially symmetrical" n : any of a series of radioactive elements with atomic numbers 89 through 103 [syn: {actinide}, {actinon}]

1: a green mineral of the amphibole group; calcium magnesium iron silicate

1: used in some classification systems for plants now included in genus Verbesina [syn: {genus Actinomeris}]

1: perennial herb with showy yellow flowers; the eastern United States [syn: {wingstem}, {golden ironweed}, {yellow ironweed}, {golden honey plant}, {Verbesina alternifolia}]

1: an instrument for measuring the intensity of electromagnetic radiation (usually by the photochemical effect)

1: of or related to actinometry [syn: {actinometrical}]

1: of or related to actinometry [syn: {actinometric}]

1: measuring the intensity of electromagnetic radiation (especially of the sun's rays)

1: capable of division into symmetrical halves by any longitudinal plane passing through the axis [syn: {actinomorphous}] [ant: {zygomorphic}]

1: capable of division into symmetrical halves by any longitudinal plane passing through the axis [syn: {actinomorphic}] [ant: {zygomorphic}]

1: soil-inhabiting saprophytes and disease-producing plant and animal parasites

1: filamentous anaerobic bacteria [syn: {family Actinomycetaceae}]

1: of or belonging to the Actinomycetes [syn: {actinomycetous}]

1: filamentous or rod-shaped bacteria [syn: {order Actinomycetales}]

1: any bacteria (some of which are pathogenic for humans and animals) belonging to the order Actinomycetales

1: of or belonging to the Actinomycetes [syn: {actinomycetal}]

1: any of various red antibiotics isolated from soil bacteria

1: disease of cattle that can be transmitted to humans; results from infection with actinomycetes; characterized by hard swellings that exude pus through long sinuses

1: of or related to actinomycosis infection

1: parasites of worms [syn: {order Actinomyxidia}]

1: parasites of worms

1: any of a series of radioactive elements with atomic numbers 89 through 103 [syn: {actinoid}, {actinide}]

1: protozoa having stiff rodlike radiating pseudopods

1: heliozoans; radiolarians [syn: {subclass Actinopoda}]

1: (medicine) the treatment of disease (especially cancer) by exposure to radiation from a radioactive substance [syn: {radiotherapy}, {radiation therapy}, {radiation}, {irradiation}]

{actinozoan}

1: sessile marine coelenterates including solitary and colonial polyps; the medusoid phase is entirely suppressed [syn: {anthozoan}] [also: {actinozoa} (pl)]

1: something done (usually as opposed to something said); "there were stories of murders and other unnatural actions" 2: the state of being active; "his sphere of activity"; "he is out of action" [syn...

1: a judicial proceeding brought by one party against another; one party prosecutes another for a wrong done or for protection of a right or for prevention of a wrong [syn: {legal action}, {action}]

1: the operating part that transmits power to a mechanism; "the piano had a very stiff action" [syn: {action}]

1: the case officer designated to perform an act during a clandestine operation (especially in a hostile area)

1: a New York school of painting characterized by freely created abstractions; the first important school of American painting to develop independently of European styles [syn: {Abstract Expressionism...

1: prostrate or semi-erect subshrub of tropical America, and Australia; heavily armed with recurved thorns and having sensitive soft gray-green leaflets that fold and droop at night or when touched or...

1: the local voltage change across the cell wall as a nerve impulse is transmitted

1: (television) showing again some action (especially sports action) that has been recorded on video tape [syn: {replay}]

1: the efficiency with which electromagnetic radiation produces a photochemical reaction plotted as a function of the wavelength of the radiation

1: affording grounds for legal action; "slander is an actionable offense"

1: a genus of Scolopacidae [syn: {genus Actitis}]

1: a variety of sandpiper [syn: {European sandpiper}]

1: common North American sandpiper [syn: {spotted sandpiper}]

1: an ancient town on a promontory in western Greece 2: the naval battle in which Antony and Cleopatra were defeated by Octavian's fleet under Agrippa in 31 BC

1: a thrombolytic agent (trade name Activase) that causes fibrinolysis at the site of a blood clot; used in treating acute myocardial infarction [syn: {tissue plasminogen activator}]

1: put in motion or move to act; "trigger a reaction"; "actuate the circuits" [syn: {trip}, {actuate}, {trigger}, {set off}, {spark off}, {spark}, {trigger off}, {touch off}] 2: make active or more ac...

1: (of sewage) treated with aeration and bacteria to aid decomposition 2: of e.g. a molecule; made reactive or more reactive [syn: {excited}] 3: rendered active; e.g. rendered radioactive or luminesce...

1: powdered or granular carbon used for purifying by adsorption; given orally (as a slurry) it is an antidote for some kinds of poisons [syn: {activated charcoal}]

1: powdered or granular carbon used for purifying by adsorption; given orally (as a slurry) it is an antidote for some kinds of poisons [syn: {activated carbon}]

1: causing motion or action or change [syn: {activating(a)}, {actuating(a)}] n : the activity of causing to have energy and be active [syn: {energizing}, {activation}]

1: (mineral extraction) a surface-active chemical used in flotation process to increase the attraction to a specific mineral

1: stimulation of activity in an organism or chemical [ant: {inactivation}] 2: the activity of causing to have energy and be active [syn: {energizing}, {activating}] 3: making active and effective (as...

1: the energy that an atomic system must acquire before a process (such as an emission or reaction) can occur; "catalysts are said to reduce the energy of activation during the transition phase of a r...

1: (biology) any agency bringing about activation; a molecule that increases the activity of an enzyme or a protein that increases the production of a gene product in DNA transcription [ant: {inhibito...

1: tending to become more severe or wider in scope; "active tuberculosis" [ant: {inactive}] 2: engaged in or ready for military or naval operations; "on active duty"; "the platoon is combat-ready"; "r...

1: chemical agent capable of activity [syn: {active}]

1: air defense by the use aircraft or missiles or artillery or electronic countermeasures

1: an application that is currently running and in the foreground

1: childbirth during which the mother is encouraged to be an active participant

1: a citizen who takes an active role in the community (as in crime prevention and neighborhood watch)

1: a form of acquired immunity in which the body produces its own antibodies against disease-causing antigens

1: a type of LCD screen used for some portable computers; there is a separate circuit for each pixel

1: a placebo used in experimental tests of a drug that has noticeable side effects; "an active placebo mimics the side effects of the experimental drug"

1: the part of an enzyme or antibody where the chemical reaction occurs

1: transport of a substance (as a protein or drug) across a cell membrane against the concentration gradient; requires an expenditure of energy

1: a trust in which the trustee must perform certain duties [ant: {passive trust}]

1: the voice used to indicate that the grammatical subject of the verb is performing the action or causing the happening denoted by the verb; "`The boy threw the ball' uses the active voice" [syn: {ac...

1: in an active manner; "he participated actively in the war" [ant: {passively}]

1: the state of being active; "his sphere of activity"; "he is out of action" [syn: {action}, {activity}] [ant: {inaction}, {inaction}, {inaction}] 2: the trait of being active; moving or acting rapid...

1: attire worn for sport or for casual wear [syn: {sportswear}, {athletic wear}]

1: a policy of taking direct and militant action to achieve a political or social goal

1: advocating or engaged in activism [syn: {activistic}] n : a militant reformer [syn: {militant}]

1: advocating or engaged in activism [syn: {activist}]

1: any specific activity; "they avoided all recreational activity" [ant: {inactivity}] 2: the state of being active; "his sphere of activity"; "he is out of action" [syn: {action}, {activeness}] [ant:...

1: a protein complex in muscle fibers; composed of myosin and actin; shortens when stimulated and causes muscle contractions

1: a theatrical performer [syn: {histrion}, {player}, {thespian}, {role player}] 2: a person who acts and gets things done; "he's a principal actor in this affair"; "when you want something done get a...

1: a business agent for an actor [syn: {theatrical agent}]

1: a wardrobe assistant for an actor [syn: {dresser}]

1: words making up the dialogue of a play; "the actor forgot his speech" [syn: {speech}, {words}]

1: a female actor

1: a New Testament book describing the development of the early Church from Christ's ascension to Paul's sojourn at Rome [syn: {Acts of the Apostles}]

1: a New Testament book describing the development of the early Church from Christ's ascension to Paul's sojourn at Rome [syn: {Acts}]

1: presently existing in fact and not merely potential or possible; "the predicted temperature and the actual temperature were markedly different"; "actual and imagined conditions" [syn: {existent}] [...

1: (law) compensation for losses that can readily be proven to have occurred and for which the injured party has the right to be compensated [syn: {compensatory damages}, {general damages}]

1: the physical ouster of a tenant from the leased premises; the tenant is relieved of any further duty to pay rent

1: (law) immediate and direct physical control over property

1: a sin committed of your own free will (as contrasted with original sin) [ant: {original sin}]

1: making real or giving the appearance of reality [syn: {realization}, {realisation}, {actualization}]

1: make real or concrete; give reality or substance to; "our ideas must be substantiated into actions" [syn: {realize}, {realise}, {actualize}, {substantiate}] 2: represent or describe realistically [...

1: changed from potential to actual; "saw his worst fears actualized" [syn: {actualized}]

1: the state of actually existing objectively; "a hope that progressed from possibility to actuality"

1: making real or giving the appearance of reality [syn: {realization}, {realisation}, {actualisation}]

1: make real or concrete; give reality or substance to; "our ideas must be substantiated into actions" [syn: {realize}, {realise}, {actualise}, {substantiate}] 2: represent or describe realistically [...

1: changed from potential to actual; "saw his worst fears actualized" [syn: {actualised}]

1: in actual fact; "to be nominally but not actually independent"; "no one actually saw the shark"; "large meteorites actually come from the asteroid belt" [syn: {really}] 2: used to imply that one wo...

1: of or relating to the work of an actuary

1: a table of statistical data [syn: {statistical table}]

1: someone versed in the collection and interpretation of numerical data (especially someone who uses statistics to calculate insurance premiums) [syn: {statistician}]

1: put in motion or move to act; "trigger a reaction"; "actuate the circuits" [syn: {trip}, {trigger}, {activate}, {set off}, {spark off}, {spark}, {trigger off}, {touch off}] 2: give an incentive for...

1: moved to action; "a man actuated by unworthy desired"

1: causing motion or action or change [syn: {activating(a)}, {actuating(a)}]

1: the act of propelling [syn: {propulsion}]

1: a mechanism that puts something into automatic action

1: activity that transgresses moral or civil law; "he denied any wrongdoing" [syn: {wrongdoing}, {wrongful conduct}, {misconduct}]

1: ending in a sharp point [syn: {acute}, {sharp}, {needlelike}]

1: sharpness of vision; the visual ability to resolve fine detail (usually measured by a Snellen chart) [syn: {visual acuity}, {sharp-sightedness}] 2: a quick and penetrating intelligence; "he argued ...

1: nonsteroidal anti-inflammatory drug (trade names Acular and Toradol) that is administered only intramuscularly [syn: {ketorolac tromethamine}, {Toradol}]

1: small spiny outgrowth on the wings of certain insects

1: having or resembling a stinger or barb; "aculeate insects such as bees and wasps" [syn: {aculeated}]

1: having or resembling a stinger or barb; "aculeate insects such as bees and wasps" [syn: {aculeate}]

1: a stiff sharp-pointed plant process 2: a sharp-pointed process especially a sting of a hymenopterous insect

1: a tapering point 2: shrewdness shown by keen insight [syn: {insightfulness}]

1: of a leaf shape; narrowing to a slender point v : make sharp or acute; taper; make (something) come to a point

1: narrowing to a slender point

1: treatment of symptoms by applying pressure with the fingers to specific pressure points on the body [syn: {G-Jo}, {shiatsu}]

1: treatment of pain or disease by inserting the tips of needles at specific points on the skin [syn: {stylostixis}]

1: having or experiencing a rapid onset and short but severe course; "acute appendicitis"; "the acute phase of the illness"; "acute patients" [ant: {chronic}] 2: extremely sharp or intense; "acute pai...