| alertness | (noun) lively attentiveness | Synonyms: on the qui vive, sharp-sightedness |
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| (noun) the process of paying close and continuous attention | Synonyms: vigilance, wakefulness, watchfulness |
| (noun) a state of readiness to respond | Synonyms: alerting |
| aleurone | (noun) granular protein in outermost layer of endosperm of many seeds or cereal grains | - |
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| alewife | (noun) shad-like food fish that runs rivers to spawn; often salted or smoked; sometimes placed in genus Pomolobus | Synonyms: Alosa pseudoharengus, Pomolobus pseudoharengus |
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| (noun) flesh of shad-like fish abundant along the Atlantic coast or in coastal streams | - |
| alexandrite | (noun) a green variety of chrysoberyl used as a gemstone | - |
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| alexia | (noun) inability to perceive written words | Synonyms: visual aphasia, word blindness |
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| alexic | (noun) a person with alexia | - |
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| alfalfa | (noun) leguminous plant grown for hay or forage | - |
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| (noun) important European leguminous forage plant with trifoliate leaves and blue-violet flowers grown widely as a pasture and hay crop | Synonyms: lucerne, Medicago sativa |
| alfilaria | (noun) European weed naturalized in southwestern United States and Mexico having reddish decumbent stems with small fernlike leaves and small deep reddish-lavender flowers followed by slender fruits that stick straight up; often grown for forage | Synonyms: alfileria, clocks, Erodium cicutarium, filaree, filaria, pin clover, pin grass, redstem storksbill |
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| alfileria | (noun) European weed naturalized in southwestern United States and Mexico having reddish decumbent stems with small fernlike leaves and small deep reddish-lavender flowers followed by slender fruits that stick straight up; often grown for forage | Synonyms: alfilaria, clocks, Erodium cicutarium, filaree, filaria, pin clover, pin grass, redstem storksbill |
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| alga | (noun) primitive chlorophyll-containing mainly aquatic eukaryotic organisms lacking true stems and roots and leaves | Synonyms: algae |
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| algae | (noun) primitive chlorophyll-containing mainly aquatic eukaryotic organisms lacking true stems and roots and leaves | Synonyms: alga |
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| algarobilla | (noun) mesquite pod used in tanning and dyeing | Synonyms: algarroba, algarrobilla |
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| algarroba | (noun) evergreen Mediterranean tree with edible pods; the biblical carob | Synonyms: carob, carob bean tree, carob tree, Ceratonia siliqua |
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| (noun) mesquite of Gulf Coast and Caribbean Islands from Mexico to Venezuela | Synonyms: Prosopis juliflora, Prosopis juliiflora |
| (noun) long pod containing small beans and sweetish edible pulp; used as animal feed and source of a chocolate substitute | Synonyms: algarroba bean, carob, carob bean, locust bean, locust pod |
| (noun) mesquite pod used in tanning and dyeing | Synonyms: algarobilla, algarrobilla |
| algarrobilla | (noun) mesquite pod used in tanning and dyeing | Synonyms: algarobilla, algarroba |
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| algebra | (noun) the mathematics of generalized arithmetical operations | - |
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| algebraist | (noun) a mathematician whose specialty is algebra | - |
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| algidity | (noun) prostration characterized by cold and clammy skin and low blood pressure | - |
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| algin | (noun) a gum used especially as a thickener or emulsifier | Synonyms: alginic acid |
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| algolagnia | (noun) sexual pleasure derived from inflicting or experiencing pain | Synonyms: algophilia |
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| algology | (noun) the branch of botany that studies algae | Synonyms: phycology |
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| algometer | (noun) device for measuring pain caused by pressure | - |
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| algometry | (noun) measuring sensitivity to pain or pressure | - |
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| algophilia | (noun) sexual pleasure derived from inflicting or experiencing pain | Synonyms: algolagnia |
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| algophobia | (noun) a morbid fear of pain | - |
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| algorism | (noun) computation with Arabic figures | - |
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| (noun) the Arabic (or decimal) system of numeration | - |
| algorithm | (noun) a precise rule (or set of rules) specifying how to solve some problem | Synonyms: algorithmic program, algorithmic rule |
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| alhamdulilah | (noun) An expression meaning 'praise God' in Arabic | - |
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| alias | (noun) a name that has been assumed | Synonyms: assumed name, false name |
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| alibi | (noun) (law) a defense by an accused person purporting to show that he or she could not have committed the crime in question | - |
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| (noun) a defense of some offensive behavior or some failure to keep a promise etc. | Synonyms: exculpation, excuse, self-justification |
| alidad | (noun) surveying instrument used with a plane table for drawing lines of sight on a distant object and for measuring angles | Synonyms: alidade |
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| (noun) surveying instrument consisting of the upper movable part of a theodolite including the telescope and its attachments | Synonyms: alidade |
| alidade | (noun) surveying instrument used with a plane table for drawing lines of sight on a distant object and for measuring angles | Synonyms: alidad |
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| (noun) surveying instrument consisting of the upper movable part of a theodolite including the telescope and its attachments | Synonyms: alidad |
| alien | (noun) a person who comes from a foreign country; someone who does not owe allegiance to your country | Synonyms: foreigner, noncitizen, outlander |
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| (noun) anyone who does not belong in the environment in which they are found | Synonyms: stranger, unknown |
| (noun) a form of life assumed to exist outside the Earth or its atmosphere | Synonyms: extraterrestrial, extraterrestrial being |
| alienage | (noun) the quality of being alien | Synonyms: alienism |
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| alienation | (noun) the action of alienating; the action of causing to become unfriendly | - |
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| (noun) (law) the voluntary and absolute transfer of title and possession of real property from one person to another | - |
| (noun) the feeling of being alienated from other people | Synonyms: disaffection, estrangement |
| (noun) separation resulting from hostility | Synonyms: estrangement |
| alienator | (noun) an unpleasant person who causes friendly people to become indifferent or unfriendly or hostile | - |
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| alienee | (noun) someone to whom the title of property is transferred | Synonyms: grantee |
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| alienism | (noun) the quality of being alien | Synonyms: alienage |
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| (noun) an obsolete term for the study and treatment of mental illness | - |
| alienist | (noun) a psychiatrist and specialist in the legal aspects of mental illness | - |
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| alienor | (noun) someone from whom the title of property is transferred | - |
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| alignment | (noun) the act of adjusting or aligning the parts of a device in relation to each other | - |
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| (noun) the spatial property possessed by an arrangement or position of things in a straight line or in parallel lines | - |
| (noun) (astronomy) apparent meeting or passing of two or more celestial bodies in the same degree of the zodiac | Synonyms: conjunction |
| (noun) an organization of people (or countries) involved in a pact or treaty | Synonyms: alinement, alliance, coalition |
| alikeness | (noun) similarity in appearance or character or nature between persons or things | Synonyms: likeness, similitude |
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| aliment | (noun) a source of materials to nourish the body | Synonyms: alimentation, nourishment, nutriment, nutrition, sustenance, victuals |
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| alimentation | (noun) the act of supplying food and nourishment | Synonyms: feeding |
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| (noun) a source of materials to nourish the body | Synonyms: aliment, nourishment, nutriment, nutrition, sustenance, victuals |
| alimony | (noun) court-ordered support paid by one spouse to another after they are separated | Synonyms: maintenance |
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| alinement | (noun) an organization of people (or countries) involved in a pact or treaty | Synonyms: alignment, alliance, coalition |
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| aliquant | (noun) an integer that is not an exact divisor of some quantity | Synonyms: aliquant part |
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| aliquot | (noun) an integer that is an exact divisor of some quantity | Synonyms: aliquot part |
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| aliterate | (noun) a person who can read but is disinclined to derive information from literary sources | Synonyms: aliterate person |
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| aliveness | (noun) the property of being animated; having animal life as distinguished from plant life | Synonyms: animateness, liveness |
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| (noun) the condition of living or the state of being alive | Synonyms: animation, life, living |
| aliyah | (noun) (Judaism) immigration of Jews to Israel | - |
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| (noun) (Judaism) the honor of being called up to the reading desk in the synagogue to read from the Torah | - |
| alizarin | (noun) an orange-red crystalline compound used in making red pigments and in dyeing | Synonyms: alizarine |
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| alizarine | (noun) an orange-red crystalline compound used in making red pigments and in dyeing | Synonyms: alizarin |
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| alkahest | (noun) hypothetical universal solvent once sought by alchemists | Synonyms: alcahest, universal solvent |
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| alkalemia | (noun) a blood disorder characterized by a lower concentration of hydrogen ions in the blood (which rises above 7.45 on the pH scale) | - |
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| alkali | (noun) any of various water-soluble compounds capable of turning litmus blue and reacting with an acid to form a salt and water | Synonyms: base |
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| (noun) a mixture of soluble salts found in arid soils and some bodies of water; detrimental to agriculture | - |
| alkalimetry | (noun) volumetric analysis using standard solutions of alkali to measure the amount of acid present | - |
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| alkalinity | (noun) pH values above 7 | - |
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| alkalinuria | (noun) a condition in which the urine (which is normally slightly acidic) is alkaline | Synonyms: alkaluria |
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| alkaliser | (noun) an agent that counteracts or neutralizes acidity (especially in the stomach) | Synonyms: alkalizer, antacid, antiacid, gastric antacid |
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| alkalizer | (noun) an agent that counteracts or neutralizes acidity (especially in the stomach) | Synonyms: alkaliser, antacid, antiacid, gastric antacid |
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| alkaloid | (noun) natural bases containing nitrogen found in plants | - |
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| alkalosis | (noun) abnormally high alkalinity (low hydrogen-ion concentration) of the blood and other body tissues | - |
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| alkaluria | (noun) a condition in which the urine (which is normally slightly acidic) is alkaline | Synonyms: alkalinuria |
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| alkane | (noun) a series of non-aromatic saturated hydrocarbons with the general formula CnH(2n+2) | Synonyms: alkane series, methane series, paraffin, paraffin series |
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| alkanet | (noun) perennial or biennial herb cultivated for its delicate usually blue flowers | Synonyms: Anchusa officinalis, bugloss |
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| alkapton | (noun) an acid formed as an intermediate product of the metabolism of tyrosine and phenylalanine | Synonyms: alcapton, homogentisic acid |
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| alkaptonuria | (noun) a rare recessive metabolic anomaly marked by ochronosis and the presence of alkapton in the urine | Synonyms: alcaptonuria |
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| alkene | (noun) any unsaturated aliphatic hydrocarbon | Synonyms: olefin, olefine |
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| alky | (noun) a person who drinks alcohol to excess habitually | Synonyms: alcoholic, boozer, dipsomaniac, lush, soaker, souse |
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| alkyd | (noun) a durable synthetic resin widely used in adhesives and paints | Synonyms: alkyd resin |
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| alkyl | (noun) any of a series of univalent groups of the general formula CnH2n+1 derived from aliphatic hydrocarbons | Synonyms: alkyl group, alkyl radical |
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| alkylbenzene | (noun) organic compound that has an alkyl group bound to a benzene ring | - |
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| alkylbenzenesulfonate | (noun) sulfonate of alkyl benzene | - |
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| alkyne | (noun) a colorless flammable gas used chiefly in welding and in organic synthesis | Synonyms: acetylene, ethyne |
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| allamanda | (noun) a plant of the genus Allamanda having large showy funnel-shaped flowers in terminal cymes | - |
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| allantois | (noun) the vascular fetal membrane that lies below the chorion and develops from the hindgut in many embryonic higher vertebrates (reptiles, birds and mammals) | - |
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| allayer | (noun) a person who reduces the intensity (e.g., of fears) and calms and pacifies | Synonyms: comforter, reliever |
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| allegation | (noun) (law) a formal accusation against somebody (often in a court of law) | - |
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| (noun) statements affirming or denying certain matters of fact that you are prepared to prove | Synonyms: allegement |
| allegement | (noun) statements affirming or denying certain matters of fact that you are prepared to prove | Synonyms: allegation |
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| allegiance | (noun) the act of binding yourself (intellectually or emotionally) to a course of action | Synonyms: commitment, dedication, loyalty |
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| (noun) the loyalty that citizens owe to their country (or subjects to their sovereign) | Synonyms: fealty |
| allegoresis | (noun) the interpretation of written, oral, or artistic expression as allegory. | - |
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| allegoricalness | (noun) The state or quality of being allegorical. | - |
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| allegoriser | (noun) someone who communicates in allegories | Synonyms: allegorizer |
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| allegorizer | (noun) someone who communicates in allegories | Synonyms: allegoriser |
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| allegory | (noun) a short moral story (often with animal characters) | Synonyms: apologue, fable, parable |
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| (noun) an expressive style that uses fictional characters and events to describe some subject by suggestive resemblances; an extended metaphor | - |
| (noun) a visible symbol representing an abstract idea | Synonyms: emblem |
| allegretto | (noun) a musical composition or musical passage to be performed at a somewhat quicker tempo than andante but not as fast as allegro | - |
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| (noun) a quicker tempo than andante but not as fast as allegro | - |
| allegro | (noun) a musical composition or musical passage to be performed quickly in a brisk lively manner | - |
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| (noun) a brisk and lively tempo | - |
| allele | (noun) (genetics) either of a pair (or series) of alternative forms of a gene that can occupy the same locus on a particular chromosome and that control the same character | Synonyms: allelomorph |
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| allelomorph | (noun) (genetics) either of a pair (or series) of alternative forms of a gene that can occupy the same locus on a particular chromosome and that control the same character | Synonyms: allele |
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| allemande | (noun) egg-thickened veloute | Synonyms: allemande sauce |
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| allergen | (noun) any substance that can cause an allergy | - |
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| allergist | (noun) a physician skilled in the diagnosis and treatment of allergies | - |
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| allergology | (noun) the branch of medical science that studies the causes and treatment of allergies | - |
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| allergy | (noun) hypersensitivity reaction to a particular allergen; symptoms can vary greatly in intensity | Synonyms: allergic reaction |
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| alleviant | (noun) remedy that alleviates pain without curing | Synonyms: alleviator, palliative |
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| alleviation | (noun) the act of reducing something unpleasant (as pain or annoyance) | Synonyms: easement, easing, relief |
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| (noun) the feeling that comes when something burdensome is removed or reduced | Synonyms: assuagement, relief |
| alleviator | (noun) remedy that alleviates pain without curing | Synonyms: alleviant, palliative |
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| (noun) a therapist who makes suffering more endurable | - |
| alley | (noun) a narrow street with walls on both sides | Synonyms: alleyway, back street |
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| (noun) a lane down which a bowling ball is rolled toward pins | Synonyms: bowling alley, skittle alley |
| alleyway | (noun) a narrow street with walls on both sides | Synonyms: alley, back street |
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| allgood | (noun) European plant naturalized in North America; often collected from the wild as a potherb | Synonyms: Chenopodium bonus-henricus, fat hen, good-king-henry, wild spinach |
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