| abandonment | (noun) withdrawing support or help despite allegiance or responsibility | Synonyms: defection, desertion |
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| (noun) the voluntary surrender of property (or a right to property) without attempting to reclaim it or give it away | - |
| (noun) the act of giving something up | Synonyms: desertion, forsaking |
| abasement | (noun) depriving one of self-esteem | Synonyms: humiliation |
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| (noun) a low or downcast state | Synonyms: abjection, degradation |
| abashment | (noun) feeling embarrassed due to modesty | Synonyms: bashfulness |
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| abatement | (noun) the act of abating | - |
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| (noun) an interruption in the intensity or amount of something | Synonyms: hiatus, reprieve, respite, suspension |
| abdomen | (noun) the region of the body of a vertebrate between the thorax and the pelvis | Synonyms: belly, stomach, venter |
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| (noun) the cavity containing the major viscera; in mammals it is separated from the thorax by the diaphragm | Synonyms: abdominal cavity |
| abdominocentesis | (noun) centesis of the belly to remove fluid for diagnosis | Synonyms: paracentesis |
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| abducens | (noun) a small motor nerve supplying the lateral rectus muscle of the eye | Synonyms: abducens nerve, abducent, abducent nerve, nervus abducens, sixth cranial nerve |
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| abducent | (adjective) especially of muscles; drawing away from the midline of the body or from an adjacent part | Synonyms: abducting |
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| (noun) a small motor nerve supplying the lateral rectus muscle of the eye | Synonyms: abducens, abducens nerve, abducent nerve, nervus abducens, sixth cranial nerve |
| abetment | (noun) the verbal act of urging on | Synonyms: abettal, instigation |
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| abhenry | (noun) a unit of inductance equal to one billionth of a henry | - |
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| abhorrence | (noun) hate coupled with disgust | Synonyms: abomination, detestation, execration, loathing, odium |
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| abhorrent | (adjective) offensive to the mind | Synonyms: detestable, obscene, repugnant, repulsive |
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| abience | (noun) (psychology) an urge to withdraw or avoid a situation or an object | - |
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| abient | (adjective) characterized by avoidance or withdrawal | - |
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| abiogenesis | (noun) a hypothetical organic phenomenon by which living organisms are created from nonliving matter | Synonyms: autogenesis, autogeny, spontaneous generation |
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| abiogenetic | (adjective) originating by abiogenesis | - |
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| abiogenist | (noun) a believer in abiogenesis | - |
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| abolishment | (noun) the act of abolishing a system or practice or institution (especially abolishing slavery) | Synonyms: abolition |
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| abortifacient | (adjective) causing abortion | - |
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| (noun) a drug (or other chemical agent) that causes abortion | Synonyms: aborticide, abortion-inducing drug |
| abrasiveness | (noun) the roughness of a substance that causes abrasions | Synonyms: harshness, scratchiness |
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| (noun) the quality of being sharply disagreeable | - |
| abridgement | (noun) a shortened version of a written work | Synonyms: abridgment, capsule, condensation |
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| abridgment | (noun) a shortened version of a written work | Synonyms: abridgement, capsule, condensation |
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| abscondment | (noun) the act of running away secretly (as to avoid arrest) | Synonyms: decampment |
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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 | - |
| absent | (adjective) not being in a specified place | - |
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| (adjective) lost in thought; showing preoccupation | Synonyms: absentminded, abstracted, scatty |
| (adjective) nonexistent | Synonyms: lacking, missing, wanting |
| (verb) stay away or leave | Synonyms: remove |
| absentee | (noun) one that is absent or not in residence | - |
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| absenteeism | (noun) habitual absence from work | - |
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| absently | (adverb) in an absentminded or preoccupied manner | Synonyms: absentmindedly, abstractedly, inattentively |
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| absentminded | (adjective) lost in thought; showing preoccupation | Synonyms: absent, abstracted, scatty |
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| absentmindedly | (adverb) in an absentminded or preoccupied manner | Synonyms: absently, abstractedly, inattentively |
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| absentmindedness | (noun) preoccupation so great that the ordinary demands on attention are ignored | - |
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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 |
| absorbefacient | (adjective) inducing or promoting absorption | Synonyms: sorbefacient |
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| absorbency | (noun) the property of being absorbent | - |
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| absorbent | (adjective) having power or capacity or tendency to absorb or soak up something (liquids or energy etc.) | Synonyms: absorptive |
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| (noun) a material having capacity or tendency to absorb another substance | Synonyms: absorbent material |
| abstention | (noun) the trait of abstaining (especially from alcohol) | Synonyms: abstinence |
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| abstentious | (adjective) self-restraining; not indulging an appetite especially for food or drink | Synonyms: abstinent |
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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 | (adjective) self-restraining; not indulging an appetite especially for food or drink | Synonyms: abstentious |
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| (noun) a person who refrains from drinking intoxicating beverages | Synonyms: abstainer, nondrinker |
| 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 |
| 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 | - |
| acaulescent | (adjective) (of plants) having no apparent stem above ground | Synonyms: stemless |
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| accent | (noun) the relative prominence of a syllable or musical note (especially with regard to stress or pitch) | Synonyms: emphasis, stress |
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| (noun) distinctive manner of oral expression | Synonyms: speech pattern |
| (noun) a diacritical mark used to indicate stress or placed above a vowel to indicate a special pronunciation | Synonyms: accent mark |
| (noun) the usage or vocabulary that is characteristic of a specific group of people | Synonyms: dialect, idiom |
| (noun) special importance or significance | Synonyms: emphasis |
| (verb) put stress on; utter with an accent | Synonyms: accentuate, stress |
| (verb) to stress, single out as important | Synonyms: accentuate, emphasise, emphasize, punctuate, stress |
| accented | (adjective) bearing a stress or accent | Synonyms: stressed |
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| (adjective) (used of syllables) bearing the principle stress, usually accompanied by a change in pitch | Synonyms: tonic |
| accenting | (noun) the act of giving special importance or significance to something | Synonyms: accentuation, emphasizing |
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| accentor | (noun) small sparrow-like songbird of mountainous regions of Eurasia | - |
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| accentual | (adjective) (of verse) having a metric system based on stress rather than syllables or quantity | - |
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| (adjective) of or pertaining to accent or stress | - |
| accentuate | (verb) to stress, single out as important | Synonyms: accent, emphasise, emphasize, punctuate, stress |
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| (verb) put stress on; utter with an accent | Synonyms: accent, stress |
| accentuation | (noun) the act of giving special importance or significance to something | Synonyms: accenting, emphasizing |
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| (noun) the use or application of an accent; the relative prominence of syllables in a phrase or utterance | - |
| acceptableness | (noun) satisfactoriness by virtue of conforming to approved standards | Synonyms: acceptability |
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| accidence | (noun) the part of grammar that deals with the inflections of words | Synonyms: inflectional morphology |
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| accident | (noun) anything that happens suddenly or by chance without an apparent cause | Synonyms: chance event, fortuity, stroke |
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| (noun) an unfortunate mishap; especially one causing damage or injury | - |
| accidental | (adjective) not of prime or central importance | Synonyms: incidental, nonessential |
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| (adjective) happening by chance or unexpectedly or unintentionally | Synonyms: inadvertent |
| (noun) a musical notation that makes a note sharp or flat or natural although that is not part of the key signature | - |
| accidentally | (adverb) without advance planning | Synonyms: by chance, circumstantially, unexpectedly |
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| (adverb) without intention; in an unintentional manner | Synonyms: unintentionally |
| (adverb) of a minor or subordinate nature | Synonyms: incidentally |
| accompaniment | (noun) the act of accompanying someone or something in order to protect them | Synonyms: escort |
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| (noun) something added to complete or embellish or make perfect | Synonyms: complement |
| (noun) a musical part (vocal or instrumental) that supports or provides background for other musical parts | Synonyms: backup, musical accompaniment, support |
| (noun) an event or situation that happens at the same time as or in connection with another | Synonyms: attendant, co-occurrence, concomitant |
| accomplishment | (noun) the action of accomplishing something | Synonyms: achievement |
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| (noun) an ability that has been acquired by training | Synonyms: acquirement, acquisition, attainment, skill |
| 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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| accouterment | (noun) clothing that is worn or carried, but not part of your main clothing | Synonyms: accessory, accoutrement |
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| accoutrement | (noun) clothing that is worn or carried, but not part of your main clothing | Synonyms: accessory, accouterment |
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| accruement | (noun) the act of accumulating | Synonyms: accrual, accumulation |
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| accumbent | (adjective) lying down; in a position of comfort or rest | Synonyms: decumbent, recumbent |
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| acentric | (adjective) lacking a centromere | - |
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| (adjective) not centered or having no center | - |
| acetaminophen | (noun) an analgesic for mild pain but not for inflammation; also used as an antipyretic; (Datril, Tylenol, Panadol, Phenaphen, Tempra, and Anacin III are trademarks of brands of acetaminophen tablets) | Synonyms: Anacin III, Datril, Panadol, Phenaphen, Tempra, Tylenol |
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| acetophenetidin | (noun) a white crystalline compound used as an analgesic and also as an antipyretic | Synonyms: acetphenetidin, phenacetin |
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| acetphenetidin | (noun) a white crystalline compound used as an analgesic and also as an antipyretic | Synonyms: acetophenetidin, phenacetin |
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| acetylene | (noun) a colorless flammable gas used chiefly in welding and in organic synthesis | Synonyms: alkyne, ethyne |
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| acetylenic | (adjective) of or related to acetylene | - |
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| 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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| achievement | (noun) the action of accomplishing something | Synonyms: accomplishment |
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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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| acidulent | (adjective) being sour to the taste | Synonyms: acid, acidic, acidulous |
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| acknowledgement | (noun) a statement acknowledging something or someone | Synonyms: acknowledgment |
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| (noun) the state or quality of being recognized or acknowledged | Synonyms: acknowledgment, recognition |
| acknowledgment | (noun) a statement acknowledging something or someone | Synonyms: acknowledgement |
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| (noun) a short note recognizing a source of information or of a quoted passage | Synonyms: citation, cite, credit, mention, quotation, reference |
| (noun) the state or quality of being recognized or acknowledged | Synonyms: acknowledgement, recognition |
| acquiescence | (noun) agreement with a statement or proposal to do something | Synonyms: assent |
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| (noun) acceptance without protest | - |
| acquiescent | (adjective) willing to carry out the orders or wishes of another without protest | Synonyms: biddable |
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| acquirement | (noun) an ability that has been acquired by training | Synonyms: accomplishment, acquisition, attainment, skill |
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| acquisitiveness | (noun) strong desire to acquire and possess | - |
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| acrocentric | (adjective) having a subterminal centromere | - |
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| acrogen | (noun) any flowerless plant such as a fern (pteridophyte) or moss (bryophyte) in which growth occurs only at the tip of the main stem | - |
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| acrogenic | (adjective) pertaining to flowerless plants (ferns or mosses) in which growth occurs only at the tip of the main stem | Synonyms: acrogenous |
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| acrogenous | (adjective) pertaining to flowerless plants (ferns or mosses) in which growth occurs only at the tip of the main stem | Synonyms: acrogenic |
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| activeness | (noun) the trait of being active; moving or acting rapidly and energetically | Synonyms: activity |
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| (noun) the state of being active | Synonyms: action, activity |
| acumen | (noun) shrewdness shown by keen insight | Synonyms: insightfulness |
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| (noun) a tapering point | - |
| acuteness | (noun) the quality of having a sharp edge or point | - |
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| (noun) a quick and penetrating intelligence | Synonyms: acuity, keenness, sharpness |
| (noun) a sensitivity that is keen and highly developed | - |
| addend | (noun) a number that is added to another number (the augend) | - |
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| addendum | (noun) textual matter that is added onto a publication; usually at the end | Synonyms: postscript, supplement |
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| adducent | (adjective) especially of muscles; bringing together or drawing toward the midline of the body or toward an adjacent part | Synonyms: adducting, adductive |
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| adenine | (noun) (biochemistry) purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA | Synonyms: A |
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| adenitis | (noun) inflammation of a gland or lymph node | - |
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| adenocarcinoma | (noun) malignant tumor originating in glandular epithelium | Synonyms: glandular cancer, glandular carcinoma |
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| adenocarcinomatous | (adjective) of or pertaining to adenocarcinoma | - |
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| adenohypophysis | (noun) the anterior lobe of the pituitary body; primarily glandular in nature | Synonyms: anterior pituitary, anterior pituitary gland |
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| adenoid | (adjective) relating to or resembling lymphatic glands or lymphoid tissue | - |
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| (noun) a collection of lymphatic tissue in the throat behind the uvula (on the posterior wall and roof of the nasopharynx) | Synonyms: Luschka's tonsil, pharyngeal tonsil, third tonsil, tonsilla adenoidea, tonsilla pharyngealis |
| adenoidal | (adjective) of or pertaining to the adenoids | - |
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| (adjective) sounding as if the nose were pinched | Synonyms: nasal, pinched |
| adenoidectomy | (noun) surgical removal of the adenoids; commonly performed along with tonsillectomy | - |
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| adenoma | (noun) a benign epithelial tumor of glandular origin | - |
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| adenomegaly | (noun) gland enlargement | - |
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| adenomyosarcoma | (noun) malignant renal tumor of young children characterized by hypertension and blood in the urine and the presence of a palpable mass | Synonyms: embryoma of the kidney, nephroblastoma, Wilms' tumor, Wilms tumour |
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| adenomyosis | (noun) the presence of endometrium elsewhere than in the lining of the uterus; causes premenstrual pain and dysmenorrhea | Synonyms: endometriosis |
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