| abortus | (noun) a human fetus whose weight is less than 0.5 kilogram when removed or expelled from the mother's body | - |
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| aboulia | (noun) a loss of will power | Synonyms: abulia |
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| above | (noun) an earlier section of a written text | - |
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| abracadabra | (noun) gibberish and nonsense | - |
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| abrachia | (noun) the condition of having no arms | - |
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| abradant | (noun) a tool or machine used for wearing down or smoothing or polishing | Synonyms: abrader |
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| (noun) a substance that abrades or wears down | Synonyms: abrasive, abrasive material |
| abrader | (noun) a tool or machine used for wearing down or smoothing or polishing | Synonyms: abradant |
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| abrasion | (noun) the wearing down of rock particles by friction due to water or wind or ice | Synonyms: attrition, detrition, grinding |
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| (noun) erosion by friction | Synonyms: attrition, corrasion, detrition |
| (noun) an abraded area where the skin is torn or worn off | Synonyms: excoriation, scrape, scratch |
| abrasive | (noun) a substance that abrades or wears down | Synonyms: abradant, abrasive material |
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| abrasiveness | (noun) the roughness of a substance that causes abrasions | Synonyms: harshness, scratchiness |
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| (noun) the quality of being sharply disagreeable | - |
| abreaction | (noun) (psychoanalysis) purging of emotional tensions | Synonyms: catharsis, katharsis |
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| abridgement | (noun) a shortened version of a written work | Synonyms: abridgment, capsule, condensation |
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| abridger | (noun) one who shortens or abridges or condenses a written work | Synonyms: abbreviator |
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| abridgment | (noun) a shortened version of a written work | Synonyms: abridgement, capsule, condensation |
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| abrocome | (noun) ratlike rodent with soft fur and large ears of the Andes | Synonyms: chinchilla rat, rat chinchilla |
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| abrogation | (noun) the act of abrogating; an official or legal cancellation | Synonyms: annulment, repeal |
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| abrogator | (noun) an authority or official empowered to abolish or annul or repeal | - |
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| abruption | (noun) an instance of sudden interruption | Synonyms: breaking off |
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| abruptness | (noun) the quality of happening with headlong haste or without warning | Synonyms: precipitance, precipitancy, precipitateness, precipitousness, suddenness |
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| (noun) the property possessed by a slope that is very steep | Synonyms: precipitousness, steepness |
| (noun) an abrupt discourteous manner | Synonyms: brusqueness, curtness, gruffness, shortness |
| abscess | (noun) symptom consisting of a localized collection of pus surrounded by inflamed tissue | - |
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| abscissa | (noun) the value of a coordinate on the horizontal axis | - |
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| abscission | (noun) the act of cutting something off | Synonyms: cutting off |
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| (noun) shedding of flowers and leaves and fruit following formation of scar tissue in a plant | - |
| absconder | (noun) a fugitive who runs away and hides to avoid arrest or prosecution | - |
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| abscondment | (noun) the act of running away secretly (as to avoid arrest) | Synonyms: decampment |
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| abseil | (noun) (mountaineering) a descent of a vertical cliff or wall made by using a doubled rope that is fixed to a higher point and wrapped around the body | Synonyms: rappel |
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| abseiler | (noun) a person who descends down a nearly vertical face by using a doubled rope that is wrapped around the body and attached to some high point | Synonyms: rappeller |
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| absence | (noun) failure to be present | - |
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| (noun) the state of being absent | - |
| (noun) the occurrence of an abrupt, transient loss or impairment of consciousness (which is not subsequently remembered), sometimes with light twitching, fluttering eyelids, etc.; common in petit mal epilepsy | Synonyms: absence seizure |
| (noun) the time interval during which something or somebody is away | - |
| absentee | (noun) one that is absent or not in residence | - |
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| absenteeism | (noun) habitual absence from work | - |
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| absentmindedness | (noun) preoccupation so great that the ordinary demands on attention are ignored | - |
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| absinth | (noun) strong green liqueur flavored with wormwood and anise | Synonyms: absinthe |
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| absinthe | (noun) strong green liqueur flavored with wormwood and anise | Synonyms: absinth |
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| (noun) aromatic herb of temperate Eurasia and North Africa having a bitter taste used in making the liqueur absinthe | Synonyms: Artemisia absinthium, common wormwood, lad's love, old man |
| absolute | (noun) something that is conceived or that exists independently and not in relation to other things; something that does not depend on anything else and is beyond human control; something that is not relative | - |
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| absoluteness | (noun) the quality of being absolute | - |
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| (noun) the quality of being complete or utter or extreme | Synonyms: starkness, utterness |
| absolution | (noun) the act of absolving or remitting; formal redemption as pronounced by a priest in the sacrament of penance | Synonyms: remission, remission of sin, remittal |
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| (noun) the condition of being formally forgiven by a priest in the sacrament of penance | - |
| absolutisation | (noun) the process of rendering something absolute or converting it into an absolute. | Synonyms: absolutization |
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| absolutism | (noun) the doctrine of an absolute being, often related to idealism in philosophy. | - |
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| (noun) an ideological belief in the complete and unrestricted power of government. | Synonyms: totalism, totalitarianism |
| (noun) a form of government in which the ruler is an absolute dictator (not restricted by a constitution or laws or opposition etc.) | Synonyms: authoritarianism, Caesarism, despotism, dictatorship, monocracy, one-man rule, shogunate, Stalinism, totalitarianism, tyranny |
| (noun) dominance through threat of punishment and violence | Synonyms: despotism, tyranny |
| absolutist | (noun) one who advocates absolutism | - |
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| absolutization | (noun) the process of rendering something absolute or converting it into an absolute. | Synonyms: absolutisation |
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| absolver | (noun) someone who grants absolution | - |
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| absorbance | (noun) (physics) a measure of the extent to which a substance transmits light or other electromagnetic radiation | Synonyms: optical density, photographic density, transmission density |
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| absorbate | (noun) a material that has been or is capable of being absorbed | - |
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| absorbency | (noun) the property of being absorbent | - |
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| absorbent | (noun) a material having capacity or tendency to absorb another substance | Synonyms: absorbent material |
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| absorber | (noun) (physics) material in a nuclear reactor that absorbs radiation | - |
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| absorptance | (noun) a measure of the rate of decrease in the intensity of electromagnetic radiation (as light) as it passes through a given substance; the fraction of incident radiant energy absorbed per unit mass or thickness of an absorber | Synonyms: absorption coefficient, coefficient of absorption |
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| absorption | (noun) the mental state of being preoccupied by something | Synonyms: engrossment, preoccupancy, preoccupation |
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| (noun) complete attention; intense mental effort | Synonyms: concentration, engrossment, immersion |
| (noun) (chemistry) a process in which one substance permeates another; a fluid permeates or is dissolved by a liquid or solid | Synonyms: soaking up |
| (noun) the process of absorbing nutrients into the body after digestion | Synonyms: assimilation |
| (noun) (physics) the process in which incident radiated energy is retained without reflection or transmission on passing through a medium | - |
| (noun) the social process of absorbing one cultural group into harmony with another | Synonyms: assimilation |
| absorptivity | (noun) (physics) the property of a body that determines the fraction of the incident radiation or sound flux absorbed or absorbable by the body | Synonyms: absorption factor |
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| abstainer | (noun) a person who refrains from drinking intoxicating beverages | Synonyms: abstinent, nondrinker |
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| (noun) someone who practices self denial as a spiritual discipline | Synonyms: ascetic |
| abstemiousness | (noun) moderation in eating and drinking | - |
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| (noun) restricted to bare necessities | - |
| abstention | (noun) the trait of abstaining (especially from alcohol) | Synonyms: abstinence |
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| abstinence | (noun) act or practice of refraining from indulging an appetite | - |
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| (noun) the trait of abstaining (especially from alcohol) | Synonyms: abstention |
| abstinent | (noun) a person who refrains from drinking intoxicating beverages | Synonyms: abstainer, nondrinker |
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| abstract | (noun) a concept or idea not associated with any specific instance | Synonyms: abstraction |
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| (noun) a sketchy summary of the main points of an argument or theory | Synonyms: outline, precis, synopsis |
| abstractedness | (noun) preoccupation with something to the exclusion of all else | Synonyms: abstraction |
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| abstracter | (noun) one who makes abstracts or summarizes information | Synonyms: abstractor |
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| abstraction | (noun) a general concept formed by extracting common features from specific examples | Synonyms: abstract entity |
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| (noun) the act of withdrawing or removing something | - |
| (noun) an abstract painting | - |
| (noun) a concept or idea not associated with any specific instance | Synonyms: abstract |
| (noun) preoccupation with something to the exclusion of all else | Synonyms: abstractedness |
| (noun) the process of formulating general concepts by abstracting common properties of instances | Synonyms: generalisation, generalization |
| abstractionism | (noun) an abstract genre of art; artistic content depends on internal form rather than pictorial representation | Synonyms: abstract art |
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| (noun) a representation having no reference to concrete objects or specific examples | Synonyms: unrealism |
| abstractionist | (noun) a painter of abstract pictures | Synonyms: abstract artist |
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| abstractness | (noun) the quality of being considered apart from a specific instance or object | - |
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| abstractor | (noun) one who makes abstracts or summarizes information | Synonyms: abstracter |
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| abstruseness | (noun) the quality of being unclear or abstruse and hard to understand | Synonyms: obscureness, obscurity, reconditeness |
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| (noun) wisdom that is recondite and abstruse and profound | Synonyms: abstrusity, profoundness, profundity, reconditeness |
| abstrusity | (noun) wisdom that is recondite and abstruse and profound | Synonyms: abstruseness, profoundness, profundity, reconditeness |
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| absurd | (noun) a situation in which life seems irrational and meaningless | Synonyms: the absurd |
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| absurdity | (noun) a ludicrous folly | Synonyms: fatuity, fatuousness, silliness |
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| (noun) a message whose content is at variance with reason | Synonyms: absurdness, ridiculousness |
| absurdness | (noun) a message whose content is at variance with reason | Synonyms: absurdity, ridiculousness |
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| abulia | (noun) a loss of will power | Synonyms: aboulia |
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| abundance | (noun) the property of a more than adequate quantity or supply | Synonyms: copiousness, teemingness |
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| (noun) (chemistry) the ratio of the total mass of an element in the earth's crust to the total mass of the earth's crust; expressed as a percentage or in parts per million | - |
| (noun) (physics) the ratio of the number of atoms of a specific isotope of an element to the total number of isotopes present | - |
| abuse | (noun) improper or excessive use | Synonyms: misuse |
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| (noun) cruel or inhumane treatment | Synonyms: ill-treatment, ill-usage, maltreatment |
| (noun) a rude expression intended to offend or hurt | Synonyms: contumely, insult, revilement, vilification |
| abuser | (noun) someone who abuses | Synonyms: maltreater |
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| abutment | (noun) a masonry support that touches and directly receives thrust or pressure of an arch or bridge | - |
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| (noun) point of contact between two objects or parts | - |
| abutter | (noun) the owner of contiguous property | - |
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| abvolt | (noun) a unit of potential equal to one-hundred-millionth of a volt | - |
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| abwatt | (noun) a power unit equal to the power dissipated when 1 abampere flows across a potential difference of 1 abvolt (one ten-thousandth of a milliwatt) | - |
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| abysm | (noun) a bottomless gulf or pit; any unfathomable (or apparently unfathomable) cavity or chasm or void extending below (often used figuratively) | Synonyms: abyss |
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| abyss | (noun) a bottomless gulf or pit; any unfathomable (or apparently unfathomable) cavity or chasm or void extending below (often used figuratively) | Synonyms: abysm |
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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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