| abomasum | (noun) the fourth compartment of the stomach of a ruminant; the one where digestion takes place | Synonyms: fourth stomach |
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| acanthoma | (noun) a neoplasm originating in the epidermis | Synonyms: skin tumor |
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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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| 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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| adenocarcinoma | (noun) malignant tumor originating in glandular epithelium | Synonyms: glandular cancer, glandular carcinoma |
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| adenoma | (noun) a benign epithelial tumor of glandular origin | - |
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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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| agromania | (noun) an intense desire to be alone or out in the open | - |
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| airwoman | (noun) a woman aviator | Synonyms: aviatress, aviatrix |
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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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| 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 |
| 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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| aroma | (noun) any property detected by the olfactory system | Synonyms: odor, odour, olfactory property, scent, smell |
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| (noun) a distinctive odor that is pleasant | Synonyms: fragrance, perfume, scent |
| aromatherapy | (noun) the therapeutic use of aromatic plant extracts and essential oils in baths or massage | - |
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| aromaticity | (noun) The property of having an aroma. | - |
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| ascoma | (noun) an ascocarp having the spore-bearing layer of cells (the hymenium) on a broad disklike receptacle | - |
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| assemblywoman | (noun) a woman assemblyman | - |
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| atheroma | (noun) a fatty deposit in the intima (inner lining) of an artery; can obstruct blood flow | - |
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| automaker | (noun) a business engaged in the manufacture of automobiles | Synonyms: auto maker, auto manufacturer, car maker, car manufacturer, carmaker |
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| automat | (noun) a cafeteria where food is served from machines | - |
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| (noun) a vending machine from which you can get food | - |
| automatic | (noun) self-loading rifle capable of automatic fire | Synonyms: automatic rifle, machine rifle |
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| (noun) a pistol that will keep firing until the ammunition is gone or the trigger is released | Synonyms: automatic pistol |
| automation | (noun) the act of implementing the control of equipment with advanced technology; usually involving electronic hardware | Synonyms: mechanisation, mechanization |
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| (noun) equipment used to achieve automatic control or operation | - |
| (noun) the condition of being automatically operated or controlled | - |
| automatism | (noun) any reaction that occurs automatically without conscious thought or reflection (especially the undirected behavior seen in psychomotor epilepsy) | - |
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| automaton | (noun) a mechanism that can move automatically | Synonyms: golem, robot |
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| (noun) a machine that operates on its own without the need for human control | - |
| (noun) someone who acts or responds in a mechanical or apathetic way | Synonyms: zombi, zombie |
| balletomane | (noun) a ballet enthusiast | - |
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| balletomania | (noun) extraordinary enthusiasm for ballets | - |
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| batrachomyomachia | (noun) a silly altercation | - |
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| beggarwoman | (noun) a woman who is a beggar | - |
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| bibliomania | (noun) preoccupation with the acquisition and possession of books | - |
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| bichromate | (noun) a salt of the hypothetical dichromic acid | Synonyms: dichromate |
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| biomass | (noun) the total mass of living matter in a given unit area | - |
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| (noun) plant materials and animal waste used as fuel | - |
| blastocytoma | (noun) a tumor composed of immature undifferentiated cells | Synonyms: blastoma, embryonal carcinosarcoma |
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| blastoma | (noun) a tumor composed of immature undifferentiated cells | Synonyms: blastocytoma, embryonal carcinosarcoma |
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| bondswoman | (noun) a female slave | Synonyms: bondmaid, bondwoman |
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| (noun) a female bound to serve without wages | Synonyms: bondmaid, bondwoman |
| (noun) a female who signs a bond as surety for someone else | - |
| bondwoman | (noun) a female slave | Synonyms: bondmaid, bondswoman |
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| (noun) a female bound to serve without wages | Synonyms: bondmaid, bondswoman |
| bromance | (noun) non-sexual but intense relationship between two men | - |
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| bromate | (noun) a chemical compound that contains the bromate ion. | - |
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| burgomaster | (noun) a mayor of a municipality in Germany or Holland or Flanders or Austria | - |
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| businesswoman | (noun) a female businessperson | - |
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| calosoma | (noun) any beetle of the genus Calosoma | - |
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| carcinoma | (noun) any malignant tumor derived from epithelial tissue; one of the four major types of cancer | - |
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| carcinosarcoma | (noun) a malignant neoplasm composed of carcinoma and sarcoma extensively intermixed | - |
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| celioma | (noun) an abdominal tumor | - |
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| celoma | (noun) a cavity in the mesoderm of an embryo that gives rise in humans to the pleural cavity and pericardial cavity and peritoneal cavity | Synonyms: celom, coelom |
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| cephalhematoma | (noun) a collection of blood under the scalp of a newborn; caused by pressure during birth | Synonyms: cephalohematoma |
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| cephalohematoma | (noun) a collection of blood under the scalp of a newborn; caused by pressure during birth | Synonyms: cephalhematoma |
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| chairwoman | (noun) the female officer who presides at the meetings of an organization | - |
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| charwoman | (noun) a human female employed to do housework | Synonyms: char, cleaning lady, cleaning woman |
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| chiromancer | (noun) fortuneteller who predicts your future by the lines on your palms | Synonyms: palmist, palmister |
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| chiromancy | (noun) telling fortunes by lines on the palm of the hand | Synonyms: chirology, palm reading, palmistry |
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| chlorpromazine | (noun) a drug (trade name Thorazine) derived from phenothiazine that has antipsychotic effects and is used as a sedative and tranquilizer | Synonyms: Thorazine |
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| chondroma | (noun) a common benign tumor of cartilage cells | - |
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| chondrosarcoma | (noun) a malignant neoplasm of cartilage cells | - |
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| chrestomathy | (noun) a selection of passages from different authors that is compiled as an aid in learning a language | - |
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| chroma | (noun) chromatic purity: freedom from dilution with white and hence vivid in hue | Synonyms: intensity, saturation, vividness |
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| chromaesthesia | (noun) a form of synesthesia in which nonvisual stimulation results in the experience of color sensations | Synonyms: chromesthesia |
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| chromate | (noun) any salt or ester of chromic acid | - |
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| chromaticity | (noun) the quality of a color as determined by its dominant wavelength | Synonyms: hue |
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| chromatid | (noun) one of two identical strands into which a chromosome splits during mitosis | - |
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| chromatin | (noun) the readily stainable substance of a cell nucleus consisting of DNA and RNA and various proteins; during mitotic division it condenses into chromosomes | Synonyms: chromatin granule |
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| chromatism | (noun) abnormal pigmentation | - |
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| (noun) hallucinatory perception of colored lights | - |
| chromatogram | (noun) the recording (column or paper strip) on which the constituents of a mixture are adsorbed in chromatography | - |
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| chromatograph | (noun) equipment that enables a sophisticated separation, e.g. gas chromatographic or liquid chromatographic separation. | - |
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| chromatography | (noun) a process used for separating mixtures by virtue of differences in absorbency | - |
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| clanswoman | (noun) a female member of a clan | - |
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| coma | (noun) a state of deep and often prolonged unconsciousness; usually the result of disease or injury | Synonyms: comatoseness |
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| (noun) (astronomy) the luminous cloud of particles surrounding the frozen nucleus of a comet; forms as the comet approaches the sun and is warmed | - |
| (noun) (botany) a usually terminal tuft of bracts (as in the pineapple) or tuft of hairs (especially on certain seeds) | - |
| comatoseness | (noun) a state of deep and often prolonged unconsciousness; usually the result of disease or injury | Synonyms: coma |
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| comatulid | (noun) free-swimming stalkless crinoid with ten feathery arms; found on muddy sea bottoms | Synonyms: feather star |
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| committeewoman | (noun) a woman who is a member of a committee | - |
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| congresswoman | (noun) a female member of the United States House of Representatives | - |
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| councilwoman | (noun) a woman who is a council member | - |
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| counterwoman | (noun) a female who attends a counter (as in a diner) | - |
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| countrywoman | (noun) a woman from your own country | - |
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| (noun) a woman who lives in the country and has country ways | - |
| customariness | (noun) The state or quality of agreeing with, or being established by, custom or common usage. | - |
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| decalcomania | (noun) the art of transferring designs from specially prepared paper to a wood or glass or metal surface | - |
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| (noun) either a design that is fixed to some surface or a paper bearing the design which is to be transferred to the surface | Synonyms: decal |
| dichromacy | (noun) a deficiency of color vision in which the person can match any given hue by mixing only two other wavelengths of light (as opposed to the three wavelengths needed by people with normal color vision) | Synonyms: dichromasy, dichromatism, dichromatopsia, dichromia |
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| dichromasy | (noun) a deficiency of color vision in which the person can match any given hue by mixing only two other wavelengths of light (as opposed to the three wavelengths needed by people with normal color vision) | Synonyms: dichromacy, dichromatism, dichromatopsia, dichromia |
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| dichromat | (noun) a person with any of the various forms of dichromacy | - |
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| dichromate | (noun) a salt of the hypothetical dichromic acid | Synonyms: bichromate |
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| dichromatism | (noun) a deficiency of color vision in which the person can match any given hue by mixing only two other wavelengths of light (as opposed to the three wavelengths needed by people with normal color vision) | Synonyms: dichromacy, dichromasy, dichromatopsia, dichromia |
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| dichromatopsia | (noun) a deficiency of color vision in which the person can match any given hue by mixing only two other wavelengths of light (as opposed to the three wavelengths needed by people with normal color vision) | Synonyms: dichromacy, dichromasy, dichromatism, dichromia |
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| diploma | (noun) a document certifying the successful completion of a course of study | Synonyms: sheepskin |
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| diplomacy | (noun) subtly skillful handling of a situation | Synonyms: delicacy, discreetness, finesse |
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| (noun) wisdom in the management of public affairs | Synonyms: statecraft, statesmanship |
| (noun) negotiation between nations | Synonyms: diplomatic negotiations |
| diplomat | (noun) an official engaged in international negotiations | Synonyms: diplomatist |
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| (noun) a person who deals tactfully with others | - |
| diplomate | (noun) medical specialist whose competence has been certified by a diploma granted by an appropriate professional group | - |
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| diplomatist | (noun) an official engaged in international negotiations | Synonyms: diplomat |
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| dipsomania | (noun) an intense persistent desire to drink alcoholic beverages to excess | Synonyms: alcoholism, potomania |
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| dipsomaniac | (noun) a person who drinks alcohol to excess habitually | Synonyms: alcoholic, alky, boozer, lush, soaker, souse |
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| distomatosis | (noun) a disease of the liver (especially in sheep and cattle) caused by liver flukes and their by-products | Synonyms: black disease, liver rot, sheep rot |
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| domain | (noun) the content of a particular field of knowledge | Synonyms: knowledge base, knowledge domain |
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| (noun) people in general; especially a distinctive group of people with some shared interest | Synonyms: world |
| (noun) (mathematics) the set of values of the independent variable for which a function is defined | Synonyms: domain of a function |
| (noun) territory over which rule or control is exercised | Synonyms: demesne, land |
| (noun) a particular environment or walk of life | Synonyms: area, arena, field, orbit, sphere |
| domatium | (noun) a part of a plant (e.g., a leaf) that has been modified to provide protection for insects or mites or fungi | - |
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