| abrachia | (noun) the condition of having no arms | - |
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| abranchial | (adjective) having no gills | Synonyms: abranchiate, abranchious, gill-less |
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| abranchiate | (adjective) having no gills | Synonyms: abranchial, abranchious, gill-less |
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| abranchious | (adjective) having no gills | Synonyms: abranchial, abranchiate, gill-less |
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| abroach | (adjective) of a cask or barrel | Synonyms: broached |
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| accouchement | (noun) the parturition process in human beings; having a baby; the process of giving birth to a child | Synonyms: childbearing, childbirth, vaginal birth |
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| accoucheur | (noun) a physician specializing in obstetrics | Synonyms: obstetrician |
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| accoucheuse | (noun) a woman skilled in aiding the delivery of babies | Synonyms: midwife |
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| acetylcholine | (noun) a neurotransmitter that is a derivative of choline; released at the ends of nerve fibers in the somatic and parasympathetic nervous systems | - |
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| ache | (noun) a dull persistent (usually moderately intense) pain | Synonyms: aching |
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| (verb) have a desire for something or someone who is not present | Synonyms: languish, pine, yearn, yen |
| (verb) be the source of pain | Synonyms: hurt, smart |
| (verb) feel physical pain | Synonyms: hurt, suffer |
| achene | (noun) small dry indehiscent fruit with the seed distinct from the fruit wall | - |
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| achenial | (adjective) pertaining to dry one-seeded indehiscent fruit | - |
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| achievability | (noun) the state of being achievable | Synonyms: attainability, attainableness |
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| achievable | (adjective) capable of existing or taking place or proving true; possible to do | Synonyms: accomplishable, doable, manageable, realizable |
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| achieve | (verb) to gain with effort | Synonyms: accomplish, attain, reach |
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| achievement | (noun) the action of accomplishing something | Synonyms: accomplishment |
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| achiever | (noun) a person with a record of successes | Synonyms: succeeder, success, winner |
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| achillea | (noun) any of several plants of the genus Achillea native to Europe and having small white flowers in flat-topped flower heads | - |
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| achimenes | (noun) any plant of the genus Achimenes having showy bell-shaped flowers that resemble gloxinias | Synonyms: hot water plant |
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| aching | (adjective) causing a dull and steady pain | Synonyms: achy |
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| (noun) a dull persistent (usually moderately intense) pain | Synonyms: ache |
| achira | (noun) canna grown especially for its edible rootstock from which arrowroot starch is obtained | Synonyms: arrowroot, Canna edulis, Canna indica, indian shot |
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| achlamydeous | (adjective) not having a floral envelope or perianth | - |
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| achlorhydria | (noun) an abnormal deficiency or absence of free hydrochloric acid in the gastric juice; often associated with severe anemias and cancer of the stomach | - |
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| achlorhydric | (adjective) lacking hydrochloric acid | - |
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| acholia | (noun) a condition in which little or no bile is secreted or the flow of bile into the digestive tract is obstructed | Synonyms: cholestasis |
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| achondrite | (noun) a stony meteor lacking chondrules | - |
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| achondritic | (adjective) not having a granular structure | - |
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| (adjective) of or related to an achondrite | - |
| achondroplasia | (noun) an inherited skeletal disorder beginning before birth; cartilage is converted to bone resulting in dwarfism | Synonyms: achondroplasty, chondrodystrophy, osteosclerosis congenita |
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| achondroplastic | (adjective) of or relating to achondroplasia | - |
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| achondroplasty | (noun) an inherited skeletal disorder beginning before birth; cartilage is converted to bone resulting in dwarfism | Synonyms: achondroplasia, chondrodystrophy, osteosclerosis congenita |
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| achromasia | (noun) unnatural lack of color in the skin (as from bruising or sickness or emotional distress) | Synonyms: lividity, lividness, luridness, paleness, pallidness, pallor, wanness |
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| achromatic | (adjective) having no hue | Synonyms: neutral |
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| achromaticity | (noun) the visual property of being without chromatic color | Synonyms: achromatism, colorlessness, colourlessness |
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| achromatin | (noun) the part of a cell nucleus that is relatively uncolored by stains or dyes | - |
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| achromatinic | (adjective) (of substance of a cell nucleus) not readily colored by stains | - |
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| achromatise | (verb) remove color from | Synonyms: achromatize |
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| achromatism | (noun) the visual property of being without chromatic color | Synonyms: achromaticity, colorlessness, colourlessness |
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| achromatize | (verb) remove color from | Synonyms: achromatise |
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| achromatous | (adjective) having little or inadequate color | - |
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| achromia | (noun) an absence of normal pigmentation especially in the skin (as in albinism) or in red blood cells | - |
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| achromic | (adjective) having no color | Synonyms: achromous |
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| achromous | (adjective) having no color | Synonyms: achromic |
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| achy | (adjective) causing a dull and steady pain | Synonyms: aching |
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| achylia | (noun) absence of gastric juices (partial or complete) | Synonyms: achylia gastrica |
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| adrenarche | (noun) the increase in activity of the adrenal glands just before puberty | - |
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| aeromechanic | (adjective) of or pertaining to aerodynamics | - |
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| aeromechanics | (noun) the branch of mechanics that deals with the motion of gases (especially air) and their effects on bodies in the flow | Synonyms: aerodynamics |
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| aeschynanthus | (noun) a plant of the genus Aeschynanthus having somewhat red or orange flowers and seeds having distinctive hairs at base and apex | - |
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| affenpinscher | (noun) European breed of small dog resembling a terrier with dark wiry hair and a tufted muzzle | Synonyms: monkey dog, monkey pinscher |
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| affranchise | (verb) grant freedom to; as from slavery or servitude | Synonyms: enfranchise |
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| aitchbone | (noun) a cut of beef including the H-shaped rump bone | - |
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| alchemic | (adjective) related to or concerned with alchemy | Synonyms: alchemical |
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| alchemical | (adjective) related to or concerned with alchemy | Synonyms: alchemic |
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| alchemise | (verb) alter (elements) by alchemy | Synonyms: alchemize |
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| alchemist | (noun) one who was versed in the practice of alchemy and who sought an elixir of life and a panacea and an alkahest and the philosopher's stone | - |
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| alchemistic | (adjective) of or relating to alchemists | Synonyms: alchemistical |
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| alchemistical | (adjective) of or relating to alchemists | Synonyms: alchemistic |
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| alchemize | (verb) alter (elements) by alchemy | Synonyms: alchemise |
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| alchemy | (noun) a pseudoscientific forerunner of chemistry in medieval times | - |
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| (noun) the way two individuals relate to each other | Synonyms: chemistry, interpersonal chemistry |
| allochronic | (adjective) (of taxa) occurring in different geologic times | - |
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| allochthonous | (adjective) of rocks, deposits, etc.; found in a place other than where they and their constituents were formed | - |
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| amphibrach | (noun) a metrical unit with unstressed-stressed-unstressed syllables (e.g., `remember') | - |
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| anachronic | (adjective) chronologically misplaced | Synonyms: anachronistic, anachronous |
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| anachronism | (noun) an artifact that belongs to another time | - |
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| (noun) a person who seems to be displaced in time; who belongs to another age | - |
| (noun) something located at a time when it could not have existed or occurred | Synonyms: misdating, mistiming |
| anachronistic | (adjective) chronologically misplaced | Synonyms: anachronic, anachronous |
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| anachronistically | (adverb) in an anachronistic manner | - |
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| anachronous | (adjective) chronologically misplaced | Synonyms: anachronic, anachronistic |
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| anarchic | (adjective) without law or control | Synonyms: anarchical, lawless |
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| anarchical | (adjective) without law or control | Synonyms: anarchic, lawless |
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| anarchically | (adverb) in a lawless rebellious manner | - |
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| anarchism | (noun) a political theory favoring the abolition of governments | - |
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| anarchist | (noun) an advocate of anarchism | Synonyms: nihilist, syndicalist |
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| anarchistic | (adjective) of or related to anarchism or tending toward anarchism | - |
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| anarchy | (noun) a state of lawlessness and disorder (usually resulting from a failure of government) | Synonyms: lawlessness |
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| anchor | (noun) a mechanical device that prevents a vessel from moving | Synonyms: ground tackle |
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| (noun) a central cohesive source of support and stability | Synonyms: backbone, keystone, linchpin, lynchpin, mainstay |
| (noun) a television reporter who coordinates a broadcast to which several correspondents contribute | Synonyms: anchorman, anchorperson |
| (verb) secure a vessel with an anchor | Synonyms: cast anchor, drop anchor |
| (verb) fix firmly and stably | Synonyms: ground |
| anchorage | (noun) the act of anchoring | - |
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| (noun) place for vessels to anchor | Synonyms: anchorage ground |
| (noun) a fee for anchoring | - |
| (noun) the condition of being secured to a base | - |
| (noun) the provision of a sense of security or steadfastness | - |
| anchorite | (noun) one retired from society for religious reasons | Synonyms: hermit |
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| anchoritic | (adjective) characterized by ascetic solitude | Synonyms: eremitic, eremitical, hermitic, hermitical |
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| anchorman | (noun) a television reporter who coordinates a broadcast to which several correspondents contribute | Synonyms: anchor, anchorperson |
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| anchorperson | (noun) a television reporter who coordinates a broadcast to which several correspondents contribute | Synonyms: anchor, anchorman |
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| anchovy | (noun) small herring-like plankton-eating fishes often canned whole or as paste; abundant in tropical waters worldwide | - |
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| (noun) tiny fishes usually canned or salted; used for hors d'oeuvres or as seasoning in sauces | - |
| anchusa | (noun) any of various Old World herbs of the genus Anchusa having one-sided clusters of trumpet-shaped flowers | - |
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| anchylosis | (noun) abnormal adhesion and rigidity of the bones of a joint | Synonyms: ankylosis |
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| anechoic | (adjective) not having or producing echoes; sound-absorbent | - |
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| anorchia | (noun) absence of one of both testes | Synonyms: anorchidism, anorchism |
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| anorchidism | (noun) absence of one of both testes | Synonyms: anorchia, anorchism |
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| anorchism | (noun) absence of one of both testes | Synonyms: anorchia, anorchidism |
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| antechamber | (noun) a large entrance or reception room or area | Synonyms: anteroom, entrance hall, foyer, hall, lobby, vestibule |
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| anticholinergic | (adjective) inhibiting or blocking the action of acetylcholine at a receptor site | - |
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| (noun) a substance that opposes or blocks the action of acetylcholine | Synonyms: anticholinergic drug |
| anticholinesterase | (noun) a medicine that inhibits cholinesterase by combining with it and so has a cholinergic effect | - |
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| antipsychotic | (noun) tranquilizer used to treat psychotic conditions when a calming effect is desired | Synonyms: antipsychotic agent, antipsychotic drug, major tranquilizer, major tranquilliser, major tranquillizer, neuroleptic, neuroleptic agent, neuroleptic drug |
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| apache | (noun) a Parisian gangster | - |
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| apochromatic | (adjective) corrected for both chromatic and spherical aberration | - |
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| apparatchik | (noun) a communist who was a member of the administrative system of a communist party | - |
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| (noun) a humorous but derogatory term for an official of a large organization (especially a political organization) | - |
| approach | (noun) the act of drawing spatially closer to something | Synonyms: approaching, coming |
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| (noun) a relatively short golf shot intended to put the ball onto the putting green | Synonyms: approach shot |
| (noun) ideas or actions intended to deal with a problem or situation | Synonyms: attack, plan of attack |
| (noun) a way of entering or leaving | Synonyms: access |
| (noun) the temporal property of becoming nearer in time | Synonyms: approaching, coming |
| (noun) a close approximation | - |
| (noun) a tentative suggestion designed to elicit the reactions of others | Synonyms: advance, feeler, overture |
| (noun) the event of one object coming closer to another | Synonyms: approaching |
| (noun) the final path followed by an aircraft as it is landing | Synonyms: approach path, glide path, glide slope |
| (verb) make advances to someone, usually with a proposal or suggestion | - |
| (verb) move towards | Synonyms: come near, come on, draw close, draw near, go up, near |
| (verb) come near in time | Synonyms: come near |
| (verb) begin to deal with | Synonyms: go about, set about |
| (verb) come near or verge on, resemble, come nearer in quality, or character | Synonyms: border on |
| approachability | (noun) the attribute of being easy to meet or deal with | Synonyms: accessibility |
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| approachable | (adjective) easy to meet or converse or do business with | - |
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| (adjective) easily approached | Synonyms: reachable |
| (adjective) capable of being read with comprehension | Synonyms: accessible |
| approaching | (adjective) of the relatively near future | Synonyms: coming, forthcoming, upcoming |
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| (noun) the act of drawing spatially closer to something | Synonyms: approach, coming |
| (noun) the temporal property of becoming nearer in time | Synonyms: approach, coming |
| (noun) the event of one object coming closer to another | Synonyms: approach |
| arachnid | (noun) air-breathing arthropods characterized by simple eyes and four pairs of legs | Synonyms: arachnoid |
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| arachnidian | (adjective) relating to or resembling a member of the class Arachnida | Synonyms: arachnoid, spiderlike, spiderly, spidery |
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