| abaca | (noun) Philippine banana tree having leafstalks that yield Manila hemp used for rope and paper etc | Synonyms: Manila hemp, Musa textilis |
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| (noun) a kind of hemp obtained from the abaca plant in the Philippines | Synonyms: Manila hemp, Manilla hemp |
| abdication | (noun) a formal resignation and renunciation of powers | Synonyms: stepping down |
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| (noun) the act of abdicating | Synonyms: stepping down |
| abdicator | (noun) one who formally relinquishes an office or responsibility | - |
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| abracadabra | (noun) gibberish and nonsense | - |
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| acacia | (noun) any of various spiny trees or shrubs of the genus Acacia | - |
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| academe | (noun) the academic world | Synonyms: academia |
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| academia | (noun) the academic world | Synonyms: academe |
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| academic | (noun) an educator who works at a college or university | Synonyms: academician, faculty member |
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| academician | (noun) an educator who works at a college or university | Synonyms: academic, faculty member |
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| (noun) a scholar who is skilled in academic disputation | Synonyms: schoolman |
| (noun) someone elected to honorary membership in an academy | - |
| academicianship | (noun) the position of member of an honorary academy | - |
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| academicism | (noun) orthodoxy of a scholastic variety | Synonyms: academism, scholasticism |
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| (noun) Purely speculative thoughts and attitudes. | - |
| (noun) a style of painting and sculpture produced under the influence of European academies of art. | Synonyms: academic art, academism |
| academism | (noun) orthodoxy of a scholastic variety | Synonyms: academicism, scholasticism |
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| (noun) a style of painting and sculpture produced under the influence of European academies of art. | Synonyms: academic art, academicism |
| academy | (noun) a learned establishment for the advancement of knowledge | - |
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| (noun) a secondary school (usually private) | - |
| (noun) a school for special training | - |
| (noun) an institution for the advancement of art or science or literature | Synonyms: honorary society |
| acantha | (noun) any sharply pointed projection | Synonyms: spine, spur |
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| acanthion | (noun) the craniometric point at the anterior extremity of the intermaxillary suture | - |
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| acanthocephalan | (noun) any of various worms living parasitically in intestines of vertebrates having a retractile proboscis covered with many hooked spines | Synonyms: spiny-headed worm |
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| acanthocyte | (noun) an abnormal red blood cell that has thorny projections of protoplasm | - |
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| acanthocytosis | (noun) the presence of acanthocytes in the blood stream (as in abetalipoproteinemia) | - |
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| acantholysis | (noun) a breakdown of a cell layer in the epidermis (as in pemphigus) | - |
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| acanthoma | (noun) a neoplasm originating in the epidermis | Synonyms: skin tumor |
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| acanthopterygian | (noun) a teleost fish with fins that are supported by sharp inflexible rays | Synonyms: spiny-finned fish |
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| acanthosis | (noun) an abnormal but benign thickening of the prickle-cell layer of the skin (as in psoriasis) | - |
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| acanthus | (noun) any plant of the genus Acanthus having large spiny leaves and spikes or white or purplish flowers; native to Mediterranean region but widely cultivated | - |
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| acapnia | (noun) a state in which the level of carbon dioxide in the blood is lower than normal; can result from deep or rapid breathing | Synonyms: hypocapnia |
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| acaracide | (noun) a chemical agent used to kill mites | Synonyms: acaricide |
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| acardia | (noun) congenital absence of the heart (as in the development of some monsters) | - |
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| acariasis | (noun) infestation with itch mites | Synonyms: acaridiasis, acariosis |
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| acaricide | (noun) a chemical agent used to kill mites | Synonyms: acaracide |
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| acarid | (noun) very small free-living arachnid that is parasitic on animals or plants; related to ticks | - |
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| acaridiasis | (noun) infestation with itch mites | Synonyms: acariasis, acariosis |
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| acarine | (noun) mite or tick | - |
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| acariosis | (noun) infestation with itch mites | Synonyms: acariasis, acaridiasis |
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| acarophobia | (noun) a morbid fear of small insects and mites and worms | - |
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| acarus | (noun) any of several mites of the order Acarina | Synonyms: genus Acarus |
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| acaryote | (noun) a cell without a nucleus (as an erythrocyte) | Synonyms: akaryocyte, akaryote |
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| acatalectic | (noun) (prosody) a line of verse that has the full number of syllables | - |
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| acataphasia | (noun) a disorder in which a lesion to the central nervous system leaves you unable to formulate a statement or to express yourself in an organized manner | - |
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| acathexia | (noun) an inability to retain bodily secretions | - |
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| acathexis | (noun) (psychoanalysis) a lack of cathexis; a condition in which significant objects or memories arouse no emotion in an individual | - |
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| acciaccatura | (noun) an embellishing note usually written in smaller size | Synonyms: appoggiatura, grace note |
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| acidification | (noun) the process of becoming acid or being converted into an acid | - |
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| acrocarp | (noun) a moss in which the main axis is terminated by the archegonium (and hence the capsule) | Synonyms: acrocarpous moss |
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| adenocarcinoma | (noun) malignant tumor originating in glandular epithelium | Synonyms: glandular cancer, glandular carcinoma |
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| adjudication | (noun) the final judgment in a legal proceeding; the act of pronouncing judgment based on the evidence presented | - |
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| adjudicator | (noun) a person who studies and settles conflicts and disputes | - |
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| advocacy | (noun) active support of an idea or cause etc.; especially the act of pleading or arguing for something | Synonyms: protagonism |
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| advocate | (noun) a person who pleads for a cause or propounds an idea | Synonyms: advocator, exponent, proponent |
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| (noun) a lawyer who pleads cases in court | Synonyms: counsel, counsellor, counselor-at-law, counselor, pleader |
| advocator | (noun) a person who pleads for a cause or propounds an idea | Synonyms: advocate, exponent, proponent |
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| affricate | (noun) a composite speech sound consisting of a stop and a fricative articulated at the same point (as `ch' in `chair' and `j' in `joy') | Synonyms: affricate consonant, affricative |
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| affrication | (noun) the conversion of a simple stop consonant into an affricate | - |
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| affricative | (noun) a composite speech sound consisting of a stop and a fricative articulated at the same point (as `ch' in `chair' and `j' in `joy') | Synonyms: affricate, affricate consonant |
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| aftercare | (noun) care and treatment of a convalescent patient | - |
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| aguacate | (noun) a pear-shaped tropical fruit with green or blackish skin and rich yellowish pulp enclosing a single large seed | Synonyms: alligator pear, avocado, avocado pear |
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| albuca | (noun) any of various plants of the genus Albuca having large clusters of pale yellow flowers; South Africa | - |
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| alcahest | (noun) hypothetical universal solvent once sought by alchemists | Synonyms: alkahest, universal solvent |
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| alcalde | (noun) a mayor or chief magistrate of a Spanish town | - |
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| alcapton | (noun) an acid formed as an intermediate product of the metabolism of tyrosine and phenylalanine | Synonyms: alkapton, homogentisic acid |
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| alcaptonuria | (noun) a rare recessive metabolic anomaly marked by ochronosis and the presence of alkapton in the urine | Synonyms: alkaptonuria |
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| alcazar | (noun) any of various Spanish fortresses or palaces built by the Moors | - |
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| allegoricalness | (noun) The state or quality of being allegorical. | - |
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| allocation | (noun) the act of distributing by allotting or apportioning; distribution according to a plan | Synonyms: allotment, apportioning, apportionment, assignation, parceling, parcelling |
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| (noun) (computer science) the assignment of particular areas of a magnetic disk to particular data or instructions | Synonyms: storage allocation |
| (noun) a share set aside for a specific purpose | Synonyms: allotment |
| allocator | (noun) a person with authority to allot or deal out or apportion | Synonyms: distributor |
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| alocasia | (noun) any plant of the genus Alocasia having large showy basal leaves and boat-shaped spathe and reddish berries | Synonyms: elephant's ear, elephant ear |
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| alpaca | (noun) domesticated llama with long silky fleece; believed to be a domesticated variety of the guanaco | Synonyms: Lama pacos |
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| (noun) a thin glossy fabric made of the wool of the Lama pacos, or made of a rayon or cotton imitation of that wool | - |
| (noun) wool of the alpaca | - |
| altercation | (noun) noisy quarrel | Synonyms: affray, fracas |
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| ambuscade | (noun) the act of concealing yourself and lying in wait to attack by surprise | Synonyms: ambush, lying in wait, trap |
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| amicability | (noun) having a disposition characterized by warmth and friendliness | Synonyms: amicableness |
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| (noun) a disinclination to quarrel | Synonyms: amicableness |
| amicableness | (noun) having a disposition characterized by warmth and friendliness | Synonyms: amicability |
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| (noun) a disinclination to quarrel | Synonyms: amicability |
| ammonification | (noun) impregnation with ammonia or a compound of ammonia | - |
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| amplification | (noun) (electronics) the act of increasing voltage or power or current | - |
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| (noun) addition of extra material or illustration or clarifying detail | Synonyms: elaboration |
| (noun) the amount of increase in signal power or voltage or current expressed as the ratio of output to input | Synonyms: gain |
| anancasm | (noun) An obsolete term for ritualistic act or sequence of acts performed by a person with obsessive-compulsive neurosis. | - |
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| anasarca | (noun) generalized edema with accumulation of serum in subcutaneous connective tissue | - |
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| anatomical | (noun) an expression that relates to anatomy | Synonyms: anatomical reference |
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| angelica | (noun) aromatic stems or leaves or roots of Angelica Archangelica | - |
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| (noun) candied stalks of the angelica plant | - |
| (noun) any of various tall and stout herbs of the genus Angelica having pinnately compound leaves and small white or greenish flowers in compound umbels | Synonyms: angelique |
| angiocardiogram | (noun) a series of X rays representing the action of the heart and its blood vessels after the injection of a radiopaque substance | - |
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| angiocarp | (noun) tree bearing fruit enclosed in a shell or involucre or husk | - |
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| anticatalyst | (noun) (chemistry) a substance that retards a chemical reaction or diminishes the activity of a catalyst | - |
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| antimacassar | (noun) a piece of ornamented cloth that protects the back of a chair from hair oils | - |
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| apicalization | (noun) (phonetics) An articulatory feature of phones, usually consonants, produced by obstructing the air passage with the tip of the tongue. | - |
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| apocalypse | (noun) a cosmic cataclysm in which God destroys the ruling powers of evil | - |
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| apothecary | (noun) a health professional trained in the art of preparing and dispensing drugs | Synonyms: chemist, druggist, pharmacist, pill pusher, pill roller |
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| applecart | (noun) a handcart from which apples and other fruit are sold in the street | - |
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| (noun) the planning that is disrupted when someone `upsets the applecart' | - |
| applicability | (noun) relevance by virtue of being applicable to the matter at hand | Synonyms: pertinence, pertinency |
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| applicant | (noun) a person who requests or seeks something such as assistance or employment or admission | Synonyms: applier |
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| application | (noun) the action of putting something into operation | - |
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| (noun) a diligent effort | Synonyms: diligence |
| (noun) the act of bringing something to bear; using it for a particular purpose | Synonyms: practical application |
| (noun) the work of applying something | Synonyms: coating, covering |
| (noun) liquid preparation having a soothing or antiseptic or medicinal action when applied to the skin | Synonyms: lotion |
| (noun) a verbal or written request for assistance or employment or admission to a school | - |
| (noun) a program that gives a computer instructions that provide the user with tools to accomplish a task | Synonyms: application program, applications programme |
| applicator | (noun) a device for applying a substance | Synonyms: applier |
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| araucaria | (noun) any of several tall South American or Australian trees with large cones and edible seeds | - |
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| arcade | (noun) a structure composed of a series of arches supported by columns | Synonyms: colonnade |
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| (noun) a covered passageway with shops and stalls on either side | - |
| arcanum | (noun) information known only to a special group | Synonyms: secret |
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| arccosecant | (noun) the angle that has a cosecant equal to a given number | Synonyms: arc cosecant, inverse cosecant |
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| arcsecant | (noun) the inverse function of the secant; the angle that has a secant equal to a given number | Synonyms: arc secant, arcsec, inverse secant |
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| areca | (noun) any of several tall tropical palms native to southeastern Asia having egg-shaped nuts | - |
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| arnica | (noun) an ointment used in treating bruises | - |
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| (noun) any of various rhizomatous usually perennial plants of the genus Arnica | - |
| (noun) used especially in treating bruises | - |
| arsenical | (noun) a pesticide or drug containing arsenic | - |
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| asarabacca | (noun) thick creeping evergreen herb of western Europe | Synonyms: Asarum europaeum |
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| ascariasis | (noun) infestation of the human intestine with Ascaris roundworms | - |
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| ascocarp | (noun) mature fruiting body of an ascomycetous fungus | - |
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| ashcake | (noun) corn bread wrapped in cabbage leaves and baked in hot ashes (southern) | Synonyms: ash cake, corn tash |
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| ashcan | (noun) a bin that holds rubbish until it is collected | Synonyms: ash-bin, ash bin, ashbin, dustbin, garbage can, trash barrel, trash bin, trash can, wastebin |
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| atypicality | (noun) any state that is not typical | Synonyms: untypicality |
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