| 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 | (noun) the muscles of the abdomen | Synonyms: ab, abdominal muscle |
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| 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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| abdominousness | (noun) the bodily property of a protruding belly | Synonyms: paunchiness |
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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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| 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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| 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 |
| accommodator | (noun) someone who performs a service or does a favor | Synonyms: obliger |
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| 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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| 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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| 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 |
| 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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| 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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| achromatism | (noun) the visual property of being without chromatic color | Synonyms: achromaticity, colorlessness, colourlessness |
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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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| 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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| 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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| actinometry | (noun) measuring the intensity of electromagnetic radiation (especially of the sun's rays) | - |
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| actinomyces | (noun) soil-inhabiting saprophytes and disease-producing plant and animal parasites | - |
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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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| 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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| 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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| 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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| 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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| 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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| 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 | (noun) a collection of objects laid on top of each other | Synonyms: cumulation, cumulus, heap, mound, pile |
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| (noun) volcanic rock consisting of large fragments fused together | - |
| agglomeration | (noun) the act of collecting in a mass; the act of agglomerating | - |
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| (noun) a jumbled collection or mass | - |
| 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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| 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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| airdrome | (noun) an airfield equipped with control tower and hangars as well as accommodations for passengers and cargo | Synonyms: aerodrome, airport, drome |
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| airwoman | (noun) a woman aviator | Synonyms: aviatress, aviatrix |
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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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| 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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| allomerism | (noun) (chemistry) variability in chemical composition without variation in crystalline form | - |
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| allometry | (noun) the study of the relative growth of a part of an organism in relation to the growth of the whole | - |
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| allomorph | (noun) a variant phonological representation of a morpheme | - |
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| (noun) any of several different crystalline forms of the same chemical compound | - |
| alumbloom | (noun) any of several herbs of the genus Heuchera | Synonyms: alumroot |
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| ambystomid | (noun) small to moderate-sized terrestrial or semiaquatic New World salamander | Synonyms: ambystomid salamander |
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| aminomethane | (noun) a methyl with the hydrogen atom replaced by an amino radical | - |
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| amygdalotomy | (noun) psychosurgery in which amygdaloid fibers that mediate limbic system activity are severed (in cases of extreme uncontrollable violence) | - |
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| anastomosis | (noun) a natural or surgical joining of parts or branches of tubular structures so as to make or become continuous | Synonyms: inosculation |
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| anatomical | (noun) an expression that relates to anatomy | Synonyms: anatomical reference |
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| anatomist | (noun) an expert in anatomy | - |
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| anatomy | (noun) a detailed analysis | - |
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| (noun) alternative names for the body of a human being | Synonyms: bod, build, chassis, figure, flesh, form, frame, human body, material body, physical body, physique, shape, soma |
| (noun) the branch of morphology that deals with the structure of animals | Synonyms: general anatomy |
| andromeda | (noun) any of several shrubs of the genus Andromeda having leathery leaves and clusters of small flowers | - |
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| (noun) broad-leaved evergreen Asiatic shrub with glossy leaves and drooping clusters of white flowers | Synonyms: Japanese andromeda, lily-of-the-valley tree, Pieris japonica |
| anemoclinometer | (noun) A type of instrument which measures the inclination of the wind to the horizontal plane. | - |
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| anemometer | (noun) a gauge for recording the speed and direction of wind | Synonyms: wind gage, wind gauge |
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| anemometry | (noun) measuring wind speed and direction | - |
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| angioma | (noun) a tumor consisting of a mass of blood or lymphatic vessels | - |
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| angiosarcoma | (noun) a rare malignant neoplasm arising from vascular tissue; usually occurs in the breast and skin and is believed to originate from the endothelial cells of blood vessels | - |
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| angstrom | (noun) a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation | Synonyms: A, angstrom unit |
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| anisometropia | (noun) difference in the refractive power of the two eyes | - |
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| anomalist | (noun) someone who has a special interest in exceptional cases | - |
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| anomalops | (noun) fish having a luminous organ beneath eye; of warm waters of the western Pacific and Puerto Rico | Synonyms: flashlight fish |
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| anomalopteryx | (noun) the smallest moa; slender moa about the size of a large turkey | Synonyms: Anomalopteryx oweni |
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| anomalousness | (noun) deviation from the normal or common order or form or rule | Synonyms: anomaly |
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| anomaly | (noun) (astronomy) position of a planet as defined by its angular distance from its perihelion (as observed from the sun) | - |
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| (noun) a person who is unusual | Synonyms: unusual person |
| (noun) deviation from the normal or common order or form or rule | Synonyms: anomalousness |
| anomia | (noun) inability to name objects or to recognize written or spoken names of objects | Synonyms: amnesic aphasia, amnestic aphasia, anomic aphasia, nominal aphasia |
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| anomie | (noun) lack of moral standards in a society | Synonyms: anomy |
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| (noun) personal state of isolation and anxiety resulting from a lack of social control and regulation | Synonyms: anomy |
| anomy | (noun) lack of moral standards in a society | Synonyms: anomie |
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| (noun) personal state of isolation and anxiety resulting from a lack of social control and regulation | Synonyms: anomie |
| anteroom | (noun) a large entrance or reception room or area | Synonyms: antechamber, entrance hall, foyer, hall, lobby, vestibule |
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| anthropometry | (noun) measurement and study of the human body and its parts and capacities | - |
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| anthropomorphism | (noun) the representation of objects (especially a god) as having human form or traits | Synonyms: theanthropism |
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| antiferromagnet | (noun) any material that has antiferromagnetic properties. | - |
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| antiferromagnetism | (noun) magnetic field creates parallel but opposing spins; varies with temperature | - |
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| antinomasia | (noun) substitution of a title for a name | - |
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| antinomian | (noun) a follower of the doctrine of antinomianism | - |
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| antinomianism | (noun) the theological doctrine that by faith and God's grace a Christian is freed from all laws (including the moral standards of the culture) | - |
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| antinomy | (noun) a contradiction between two statements that seem equally reasonable | - |
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| aplomb | (noun) great coolness and composure under strain | Synonyms: assuredness, cool, poise, sang-froid |
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| apomict | (noun) a plant that reproduces or is reproduced by apomixis | - |
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