| allopathy | (noun) the usual method of treating disease with remedies that produce effects differing from those produced by the disease itself | - |
|---|
| allopatry | (noun) the occurrence of related organisms in separate geographical areas with no overlap | - |
|---|
| allophone | (noun) (linguistics) any of various acoustically different forms of the same phoneme | - |
|---|
| allopurinol | (noun) a drug (trade name Zyloprim) used to treat gout and other conditions in which there is an excessive buildup of uric acid | Synonyms: Zyloprim |
|---|
| allosaur | (noun) late Jurassic carnivorous dinosaur; similar to but somewhat smaller than tyrannosaurus | Synonyms: allosaurus |
|---|
| allosaurus | (noun) late Jurassic carnivorous dinosaur; similar to but somewhat smaller than tyrannosaurus | Synonyms: allosaur |
|---|
| allotment | (noun) the act of distributing by allotting or apportioning; distribution according to a plan | Synonyms: allocation, apportioning, apportionment, assignation, parceling, parcelling |
|---|
| (noun) a share set aside for a specific purpose | Synonyms: allocation |
| allotrope | (noun) a structurally different form of an element | - |
|---|
| allotropism | (noun) the phenomenon of an element existing in two or more physical forms | Synonyms: allotropy |
|---|
| allotropy | (noun) the phenomenon of an element existing in two or more physical forms | Synonyms: allotropism |
|---|
| allowance | (noun) the act of allowing | - |
|---|
| (noun) a permissible difference; allowing some freedom to move within limits | Synonyms: leeway, margin, tolerance |
| (noun) an amount allowed or granted (as during a given period) | - |
| (noun) an amount added or deducted on the basis of qualifying circumstances | Synonyms: adjustment |
| (noun) a sum granted as reimbursement for expenses | - |
| (noun) a reserve fund created by a charge against profits in order to provide for changes in the value of a company's assets | Synonyms: allowance account, valuation account, valuation reserve |
| alloy | (noun) the state of impairing the quality or reducing the value of something | Synonyms: admixture |
|---|
| (noun) a mixture containing two or more metallic elements or metallic and nonmetallic elements usually fused together or dissolving into each other when molten | Synonyms: metal |
| allspice | (noun) ground dried berrylike fruit of a West Indian allspice tree; suggesting combined flavors of cinnamon and nutmeg and cloves | - |
|---|
| (noun) aromatic West Indian tree that produces allspice berries | Synonyms: allspice tree, Pimenta dioica, pimento tree |
| (noun) deciduous shrubs having aromatic bark; eastern China; southwestern and eastern United States | - |
| allure | (noun) the power to entice or attract through personal charm | Synonyms: allurement, temptingness |
|---|
| allurement | (noun) the act of enticing a person to do something wrong (as an offer of sex in return for money) | Synonyms: solicitation |
|---|
| (noun) the power to entice or attract through personal charm | Synonyms: allure, temptingness |
| (noun) attractiveness | - |
| allusion | (noun) passing reference or indirect mention | - |
|---|
| allusiveness | (noun) a quality characterized by indirect reference | - |
|---|
| alluviation | (noun) the phenomenon of sediment or gravel accumulating | Synonyms: deposit, sedimentation |
|---|
| alluvion | (noun) clay or silt or gravel carried by rushing streams and deposited where the stream slows down | Synonyms: alluvial deposit, alluvial sediment, alluvium |
|---|
| (noun) the rising of a body of water and its overflowing onto normally dry land | Synonyms: deluge, flood, inundation |
| (noun) gradual formation of new land, by recession of the sea or deposit of sediment | - |
| alluvium | (noun) clay or silt or gravel carried by rushing streams and deposited where the stream slows down | Synonyms: alluvial deposit, alluvial sediment, alluvion |
|---|
| ally | (noun) a friendly nation | - |
|---|
| (noun) an associate who provides cooperation or assistance | Synonyms: friend |
| allyl | (noun) the univalent unsaturated organic radical C3H5; derived from propylene | Synonyms: allyl group, allyl radical |
|---|
| almanac | (noun) an annual publication containing tabular information in a particular field or fields arranged according to the calendar of a given year | - |
|---|
| (noun) an annual publication including weather forecasts and other miscellaneous information arranged according to the calendar of a given year | Synonyms: farmer's calendar |
| almandine | (noun) a purple variety of the ruby spinel | - |
|---|
| (noun) a deep red garnet consisting of iron aluminum silicate | Synonyms: almandite |
| almandite | (noun) a deep red garnet consisting of iron aluminum silicate | Synonyms: almandine |
|---|
| almond | (noun) oval-shaped edible seed of the almond tree | - |
|---|
| (noun) small bushy deciduous tree native to Asia and North Africa having pretty pink blossoms and highly prized edible nuts enclosed in a hard green hull; cultivated in southern Australia and California | Synonyms: Amygdalus communis, Prunus amygdalus, Prunus dulcis, sweet almond |
| almoner | (noun) an official in a British hospital who looks after the social and material needs of the patients | Synonyms: medical social worker |
|---|
| alms | (noun) money or goods contributed to the poor | - |
|---|
| almsgiver | (noun) a person who gives alms | - |
|---|
| almsgiving | (noun) making voluntary contributions to aid the poor | Synonyms: alms-giving |
|---|
| 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 |
|---|
| aloe | (noun) succulent plants having rosettes of leaves usually with fiber like hemp and spikes of showy flowers; found chiefly in Africa | - |
|---|
| aloes | (noun) a purgative made from the leaves of aloe | Synonyms: bitter aloes |
|---|
| aloha | (noun) an acknowledgment that can be used to say hello or goodbye (aloha is Hawaiian and ciao is Italian) | Synonyms: ciao |
|---|
| aloneness | (noun) a disposition toward being alone | Synonyms: loneliness, lonesomeness, solitariness |
|---|
| aloofness | (noun) a disposition to be distant and unsympathetic in manner | Synonyms: remoteness, standoffishness, withdrawnness |
|---|
| (noun) indifference by personal withdrawal | Synonyms: distance |
| alopecia | (noun) loss of hair (especially on the head) or loss of wool or feathers; in humans it can result from heredity or hormonal imbalance or certain diseases or drugs and treatments (chemotherapy for cancer) | - |
|---|
| alp | (noun) any high mountain | - |
|---|
| alpaca | (noun) domesticated llama with long silky fleece; believed to be a domesticated variety of the guanaco | Synonyms: Lama pacos |
|---|
| (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 | - |
| alpenstock | (noun) a stout staff with a metal point; used by mountain climbers | - |
|---|
| alpha | (noun) the 1st letter of the Greek alphabet | - |
|---|
| (noun) the beginning of a series or sequence | - |
| alphabet | (noun) the elementary stages of any subject (usually plural) | Synonyms: first principles, rudiments |
|---|
| (noun) a character set that includes letters and is used to write a language | Synonyms: ABC's, ABC, ABCs |
| alphabetisation | (noun) the act of putting in alphabetical order | Synonyms: alphabetization |
|---|
| alphabetiser | (noun) a literate person who can arrange items in alphabetical order | Synonyms: alphabetizer |
|---|
| alphabetization | (noun) the act of putting in alphabetical order | Synonyms: alphabetisation |
|---|
| alphabetizer | (noun) a literate person who can arrange items in alphabetical order | Synonyms: alphabetiser |
|---|
| alphanumerics | (noun) a character set that includes letters and digits and punctuation | Synonyms: alphanumeric characters |
|---|
| alphavirus | (noun) an arbovirus of the family Togaviridae that can cause a variety of encephalitis in horses | - |
|---|
| alpinist | (noun) a mountain climber who specializes in difficult climbs | - |
|---|
| alprazolam | (noun) an antianxiety agent (trade name Xanax) of the benzodiazepine class | Synonyms: Xanax |
|---|
| alsatian | (noun) breed of large shepherd dogs used in police work and as a guide for the blind | Synonyms: German police dog, German shepherd, German shepherd dog |
|---|
| alstroemeria | (noun) any of various South American plants of the genus Alstroemeria valued for their handsome umbels of beautiful flowers | - |
|---|
| altar | (noun) a raised structure on which gifts or sacrifices to a god are made | - |
|---|
| (noun) the table in Christian churches where communion is given | Synonyms: communion table, Lord's table |
| altarpiece | (noun) a painted or carved screen placed above and behind an altar or communion table | Synonyms: reredos |
|---|
| altazimuth | (noun) an instrument that measures the altitude and azimuth of celestial bodies; used in navigation | - |
|---|
| altcoin | (noun) an alternative cryptocurrency | - |
|---|
| alterability | (noun) the quality of being alterable | - |
|---|
| alteration | (noun) the act of revising or altering (involving reconsideration and modification) | Synonyms: revision |
|---|
| (noun) the act of making something different (as e.g. the size of a garment) | Synonyms: adjustment, modification |
| (noun) an event that occurs when something passes from one state or phase to another | Synonyms: change, modification |
| altercation | (noun) noisy quarrel | Synonyms: affray, fracas |
|---|
| altering | (noun) the sterilization of an animal | Synonyms: fixing, neutering |
|---|
| alternate | (noun) someone who takes the place of another person | Synonyms: replacement, surrogate |
|---|
| alternation | (noun) successive change from one thing or state to another and back again | - |
|---|
| alternative | (noun) one of a number of things from which only one can be chosen | Synonyms: choice, option |
|---|
| alternator | (noun) an old term for an electric generator that produces alternating current (especially in automobiles) | - |
|---|
| althaea | (noun) any of various plants of the genus Althaea; similar to but having smaller flowers than genus Alcea | Synonyms: althea, hollyhock |
|---|
| althea | (noun) any of various plants of the genus Althaea; similar to but having smaller flowers than genus Alcea | Synonyms: althaea, hollyhock |
|---|
| altimeter | (noun) an instrument that measures the height above ground; used in navigation | - |
|---|
| altitude | (noun) elevation especially above sea level or above the earth's surface | Synonyms: height |
|---|
| (noun) angular distance above the horizon (especially of a celestial object) | Synonyms: ALT, EL, elevation |
| (noun) the perpendicular distance from the base of a geometric figure to the opposite vertex (or side if parallel) | - |
| alto | (noun) the pitch range of the lowest female voice | - |
|---|
| (noun) (of a musical instrument) the second highest instrument in a family of musical instruments | - |
| (noun) the lowest female singing voice | Synonyms: contralto |
| (noun) the highest adult male singing voice | Synonyms: countertenor |
| (noun) a singer whose voice lies in the alto clef | - |
| altocumulus | (noun) a cumulus cloud at an intermediate altitude of 2 or 3 miles | Synonyms: altocumulus cloud |
|---|
| altogether | (noun) informal terms for nakedness | Synonyms: birthday suit, raw |
|---|
| altoist | (noun) a musician who plays the alto saxophone | Synonyms: alto saxophonist |
|---|
| altostratus | (noun) a stratus cloud at an intermediate altitude of 2 or 3 miles | Synonyms: altostratus cloud |
|---|
| altruism | (noun) the quality of unselfish concern for the welfare of others | Synonyms: selflessness |
|---|
| altruist | (noun) someone who makes charitable donations intended to increase human well-being | Synonyms: philanthropist |
|---|
| alula | (noun) tuft of small stiff feathers on the first digit of a bird's wing | Synonyms: bastard wing, spurious wing |
|---|
| (noun) scalelike structure between the base of the wing and the halter of a two-winged fly | Synonyms: calypter |
| alum | (noun) a double sulphate of aluminum and potassium that is used as an astringent (among other things) | - |
|---|
| (noun) a white crystalline double sulfate of aluminum: the potassium double sulfate of aluminum | Synonyms: potash alum, potassium alum |
| (noun) a white crystalline double sulfate of aluminum: the ammonium double sulfate of aluminum | Synonyms: ammonia alum, ammonium alum |
| (noun) a person who has received a degree from a school (high school or college or university) | Synonyms: grad, graduate |
| alumbloom | (noun) any of several herbs of the genus Heuchera | Synonyms: alumroot |
|---|
| alumina | (noun) any of various forms of aluminum oxide occurring naturally as corundum | Synonyms: aluminium oxide, aluminum oxide |
|---|
| aluminate | (noun) a compound of alumina and a metallic oxide | - |
|---|
| aluminium | (noun) a silvery ductile metallic element found primarily in bauxite | Synonyms: Al, aluminum, atomic number 13 |
|---|
| aluminum | (noun) a silvery ductile metallic element found primarily in bauxite | Synonyms: Al, aluminium, atomic number 13 |
|---|
| alumna | (noun) a female person who has received a degree from a school (high school or college or university) | - |
|---|
| alumnus | (noun) a male person who has received a degree from a school (high school or college or university) | - |
|---|
| alumroot | (noun) any of several herbs of the genus Heuchera | Synonyms: alumbloom |
|---|
| alundum | (noun) a substance made of fused alumina | - |
|---|
| alveolar | (noun) a consonant articulated with the tip of the tongue near the gum ridge | Synonyms: alveolar consonant, dental, dental consonant |
|---|
| alveolitis | (noun) inflammation of the alveoli in the lungs caused by inhaling dust; with repeated exposure the condition may become chronic | - |
|---|
| (noun) inflammation in the socket of a tooth; sometimes occurs after a tooth is extracted and a blood clot fails to form | Synonyms: dry socket |
| alveolus | (noun) a tiny sac for holding air in the lungs; formed by the terminal dilation of tiny air passageways | Synonyms: air cell, air sac |
|---|
| (noun) a bony socket in the alveolar ridge that holds a tooth | Synonyms: tooth socket |
| alyssum | (noun) any garden plant of the genus Alyssum having clusters of small yellow or white flowers | Synonyms: madwort |
|---|
| amalgam | (noun) a combination or blend of diverse things | - |
|---|
| (noun) an alloy of mercury with another metal (usually silver) used by dentists to fill cavities in teeth; except for iron and platinum all metals dissolve in mercury and chemists refer to the resulting mercury mixtures as amalgams | Synonyms: dental amalgam |
| amalgamation | (noun) the combination of two or more commercial companies | Synonyms: merger, uniting |
|---|
| amalgamator | (noun) a businessman who arranges an amalgamation of two or more commercial companies | - |
|---|
| amarelle | (noun) pale red sour cherry with colorless or nearly colorless juice | - |
|---|
| (noun) any of several cultivated sour cherry trees bearing pale red fruit with colorless juice | Synonyms: Prunus cerasus caproniana |
| amaryllis | (noun) bulbous plant having showy white to reddish flowers | - |
|---|
| amatungulu | (noun) very large closely branched South African shrub having forked bright green spines and shiny leaves | Synonyms: Carissa grandiflora, Carissa macrocarpa, natal plum |
|---|
| amberbell | (noun) eastern North American dogtooth having solitary yellow flowers marked with brown or purple and spotted interiors | Synonyms: Erythronium americanum, trout lily, yellow adder's tongue |
|---|
| ambivalence | (noun) mixed feelings or emotions | Synonyms: ambivalency |
|---|
| ambivalency | (noun) mixed feelings or emotions | Synonyms: ambivalence |
|---|
| amble | (noun) a leisurely walk (usually in some public place) | Synonyms: perambulation, promenade, saunter, stroll |
|---|