| abcoulomb | (noun) a unit of electrical charge equal to 10 coulombs | - |
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| 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 |
| abdominal | (adjective) of or relating to or near the abdomen | - |
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| (noun) the muscles of the abdomen | Synonyms: ab, abdominal muscle |
| abdominocentesis | (noun) centesis of the belly to remove fluid for diagnosis | Synonyms: paracentesis |
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| abdominoplasty | (noun) cosmetic surgery of the abdomen to remove wrinkles and tighten the skin over the stomach | Synonyms: tummy tuck |
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| abdominous | (adjective) having a large belly | Synonyms: paunchy, potbellied |
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| abdominousness | (noun) the bodily property of a protruding belly | Synonyms: paunchiness |
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| abdominovesical | (adjective) of or relating to the abdomen and the urinary bladder | - |
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| abloom | (adjective) when the bud, or buds, on a plant are bursting into flower | Synonyms: efflorescent |
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| abomasal | (adjective) relating to the abomasum (the fourth compartment of the stomach of ruminants) | - |
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| abomasum | (noun) the fourth compartment of the stomach of a ruminant; the one where digestion takes place | Synonyms: fourth stomach |
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| abominable | (adjective) exceptionally bad or displeasing | Synonyms: atrocious, awful, dreadful, painful, terrible, unspeakable |
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| (adjective) unequivocally detestable | Synonyms: detestable, execrable, odious |
| abominably | (adverb) in a terrible manner | Synonyms: abysmally, atrociously, awfully, rottenly, terribly |
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| (adverb) in an offensive and hateful manner | Synonyms: detestably, odiously, repulsively |
| abominate | (verb) find repugnant | Synonyms: abhor, execrate, loathe |
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| abomination | (noun) an action that is vicious or vile; an action that arouses disgust or abhorrence | - |
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| (noun) hate coupled with disgust | Synonyms: abhorrence, detestation, execration, loathing, odium |
| (noun) a person who is loathsome or disgusting | - |
| abominator | (noun) one who hates or loathes | Synonyms: loather |
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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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| acanthoma | (noun) a neoplasm originating in the epidermis | Synonyms: skin tumor |
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| accelerometer | (noun) an instrument for measuring the acceleration of aircraft or rockets | - |
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| accommodate | (verb) make fit for, or change to suit a new purpose | Synonyms: adapt |
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| (verb) make (one thing) compatible with (another) | Synonyms: conciliate, reconcile |
| (verb) provide a service or favor for someone | Synonyms: oblige |
| (verb) provide with something desired or needed | - |
| (verb) be agreeable or acceptable to | Synonyms: fit, suit |
| (verb) provide housing for | Synonyms: lodge |
| (verb) have room for; hold without crowding | Synonyms: admit, hold |
| accommodating | (adjective) helpful in bringing about a harmonious adaptation | Synonyms: accommodative |
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| (adjective) obliging; willing to do favors | - |
| accommodatingly | (adverb) in accommodation | Synonyms: obligingly |
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| accommodation | (noun) the act of providing something (lodging or seat or food) to meet a need | - |
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| (noun) (physiology) the automatic adjustment in focal length of the natural lens of the eye | - |
| (noun) living quarters provided for public convenience | - |
| (noun) in the theories of Jean Piaget: the modification of internal representations in order to accommodate a changing knowledge of reality | - |
| (noun) a settlement of differences | - |
| (noun) making or becoming suitable; adjusting to circumstances | Synonyms: adjustment, fitting |
| accommodational | (adjective) of or relating to the accommodation of the lens of the eye | - |
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| accommodative | (adjective) helpful in bringing about a harmonious adaptation | Synonyms: accommodating |
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| (adjective) tending to reconcile or accommodate; bringing into harmony | Synonyms: reconciling |
| (adjective) willing to adjust to differences in order to obtain agreement | Synonyms: cooperative |
| accommodator | (noun) someone who performs a service or does a favor | Synonyms: obliger |
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| accompanied | (adjective) having companions or an escort | - |
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| (adjective) playing or singing with instrumental or vocal accompaniment | Synonyms: attended |
| 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 |
| accompanist | (noun) a person who provides musical accompaniment (usually on a piano) | Synonyms: accompanyist |
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| accompany | (verb) perform an accompaniment to | Synonyms: follow, play along |
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| (verb) go or travel along with | - |
| (verb) be present or associated with an event or entity | Synonyms: attach to, come with, go with |
| (verb) be a companion to somebody | Synonyms: companion, company, keep company |
| accompanying | (adjective) occurring with or following as a consequence | Synonyms: attendant, collateral, concomitant, consequent, ensuant, incidental, resultant, sequent |
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| accompanyist | (noun) a person who provides musical accompaniment (usually on a piano) | Synonyms: accompanist |
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| accomplice | (noun) a person who joins with another in carrying out some plan (especially an unethical or illegal plan) | Synonyms: confederate |
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| accomplish | (verb) put in effect | Synonyms: action, carry out, carry through, execute, fulfil, fulfill |
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| (verb) to gain with effort | Synonyms: achieve, attain, reach |
| accomplishable | (adjective) capable of existing or taking place or proving true; possible to do | Synonyms: achievable, doable, manageable, realizable |
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| accomplished | (adjective) successfully completed or brought to an end | Synonyms: completed, realised, realized |
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| (adjective) settled securely and unconditionally | Synonyms: effected, established |
| (adjective) highly skilled | Synonyms: complete |
| 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 |
| accustom | (verb) make psychologically or physically used (to something) | Synonyms: habituate |
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| accustomed | (adjective) commonly used or practiced; usual | Synonyms: customary, habitual, wonted |
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| achromasia | (noun) unnatural lack of color in the skin (as from bruising or sickness or emotional distress) | Synonyms: lividity, lividness, luridness, paleness, pallidness, pallor, wanness |
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| achromatic | (adjective) having no hue | Synonyms: neutral |
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| achromaticity | (noun) the visual property of being without chromatic color | Synonyms: achromatism, colorlessness, colourlessness |
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| achromatin | (noun) the part of a cell nucleus that is relatively uncolored by stains or dyes | - |
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| achromatinic | (adjective) (of substance of a cell nucleus) not readily colored by stains | - |
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| achromatise | (verb) remove color from | Synonyms: achromatize |
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| achromatism | (noun) the visual property of being without chromatic color | Synonyms: achromaticity, colorlessness, colourlessness |
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| achromatize | (verb) remove color from | Synonyms: achromatise |
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| achromatous | (adjective) having little or inadequate color | - |
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| achromia | (noun) an absence of normal pigmentation especially in the skin (as in albinism) or in red blood cells | - |
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| achromic | (adjective) having no color | Synonyms: achromous |
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| achromous | (adjective) having no color | Synonyms: achromic |
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| acromegalia | (noun) enlargement of bones of hands and feet and face; often accompanied by headache and muscle pain and emotional disturbances; caused by overproduction of growth hormone by the anterior pituitary gland (due to a tumor) | Synonyms: acromegaly |
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| acromegalic | (adjective) marked or affected by enlargement or hypertrophy of the extremities or the face | - |
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| acromegaly | (noun) enlargement of bones of hands and feet and face; often accompanied by headache and muscle pain and emotional disturbances; caused by overproduction of growth hormone by the anterior pituitary gland (due to a tumor) | Synonyms: acromegalia |
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| acromicria | (noun) abnormally small extremities (underdeveloped fingers and toes) | Synonyms: acromikria |
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| acromikria | (noun) abnormally small extremities (underdeveloped fingers and toes) | Synonyms: acromicria |
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| acromion | (noun) the outermost point of the spine of the shoulder blade | Synonyms: acromial process |
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| acromphalus | (noun) abnormal protrusion of the navel; sometimes the start of umbilical hernia | - |
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| acromyotonia | (noun) myotonia of the extremities only; causes spastic deformity of the hand or foot | - |
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| acrosome | (noun) a process at the anterior end of a sperm cell that produces enzymes to facilitate penetration of the egg | - |
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| actinometer | (noun) an instrument for measuring the intensity of electromagnetic radiation (usually by the photochemical effect) | - |
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| actinometric | (adjective) of or related to actinometry | Synonyms: actinometrical |
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| actinometrical | (adjective) of or related to actinometry | Synonyms: actinometric |
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| actinometry | (noun) measuring the intensity of electromagnetic radiation (especially of the sun's rays) | - |
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| actinomorphic | (adjective) capable of division into symmetrical halves by any longitudinal plane passing through the axis | Synonyms: actinomorphous |
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| actinomorphous | (adjective) capable of division into symmetrical halves by any longitudinal plane passing through the axis | Synonyms: actinomorphic |
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| actinomyces | (noun) soil-inhabiting saprophytes and disease-producing plant and animal parasites | - |
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| actinomycetal | (adjective) of or belonging to the actinomycetes | Synonyms: actinomycetous |
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| actinomycete | (noun) any bacteria (some of which are pathogenic for humans and animals) belonging to the order Actinomycetales | - |
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| actinomycetous | (adjective) of or belonging to the actinomycetes | Synonyms: actinomycetal |
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| actinomycin | (noun) any of various red antibiotics isolated from soil bacteria | - |
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| actinomycosis | (noun) disease of cattle that can be transmitted to humans; results from infection with actinomycetes; characterized by hard swellings that exude pus through long sinuses | - |
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| actinomycotic | (adjective) of or related to actinomycosis infection | - |
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| actinomyxidian | (noun) of or relating to parasites of worms | - |
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| actomyosin | (noun) a protein complex in muscle fibers; composed of myosin and actin; shortens when stimulated and causes muscle contractions | - |
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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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| 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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| adrenalectomy | (noun) surgical removal of one or both adrenal glands | Synonyms: suprarenalectomy |
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| adventuresome | (adjective) willing to undertake or seeking out new and daring enterprises | Synonyms: adventurous |
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| aerodrome | (noun) an airfield equipped with control tower and hangars as well as accommodations for passengers and cargo | Synonyms: airdrome, airport, drome |
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| aeromechanic | (adjective) of or pertaining to aerodynamics | - |
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| aeromechanics | (noun) the branch of mechanics that deals with the motion of gases (especially air) and their effects on bodies in the flow | Synonyms: aerodynamics |
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| aeromedical | (adjective) of or relating to aviation medicine | - |
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| aeromedicine | (noun) the study and treatment of disorders associated with flight (especially with space flight) | Synonyms: aerospace medicine, aviation medicine |
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| agglomerate | (adjective) clustered together but not coherent | Synonyms: agglomerated, agglomerative, clustered |
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| (noun) a collection of objects laid on top of each other | Synonyms: cumulation, cumulus, heap, mound, pile |
| (noun) volcanic rock consisting of large fragments fused together | - |
| (verb) form into one cluster | - |
| agglomerated | (adjective) clustered together but not coherent | Synonyms: agglomerate, agglomerative, clustered |
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| agglomeration | (noun) the act of collecting in a mass; the act of agglomerating | - |
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| (noun) a jumbled collection or mass | - |
| agglomerative | (adjective) clustered together but not coherent | Synonyms: agglomerate, agglomerated, clustered |
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| agglomerator | (noun) a device that causes material to gather into rounded balls | - |
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| agnomen | (noun) an additional name or an epithet appended to a name (as in `Ferdinand the Great') | - |
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| agromania | (noun) an intense desire to be alone or out in the open | - |
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| agronomic | (adjective) of or relating to or promoting agronomy | Synonyms: agronomical |
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| agronomical | (adjective) of or relating to or promoting agronomy | Synonyms: agronomic |
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| agronomist | (noun) an expert in soil management and field-crop production | - |
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| agronomy | (noun) the application of soil and plant sciences to land management and crop production | Synonyms: scientific agriculture |
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