| 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 |
| abrocome | (noun) ratlike rodent with soft fur and large ears of the Andes | Synonyms: chinchilla rat, rat chinchilla |
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| accelerometer | (noun) an instrument for measuring the acceleration of aircraft or rockets | - |
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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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| 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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| adenomegaly | (noun) gland enlargement | - |
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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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| 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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| 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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| 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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| aminomethane | (noun) a methyl with the hydrogen atom replaced by an amino radical | - |
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| 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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| anisometropia | (noun) difference in the refractive power of the two eyes | - |
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| anthropometry | (noun) measurement and study of the human body and its parts and capacities | - |
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| arthromere | (noun) any of the segments in the body of a jointed animal like an arthropod | - |
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| astrodome | (noun) a transparent dome on top of an airplane where the navigator can make celestial observations | - |
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| astrometry | (noun) the branch of astronomy that deals with the measurement of the position and motion of celestial bodies | - |
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| astronomer | (noun) a physicist who studies astronomy | Synonyms: stargazer, uranologist |
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| atmometer | (noun) an instrument that measures rate of evaporation of water | Synonyms: evaporometer |
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| audiometer | (noun) an instrument used to measure the sensitivity of hearing | Synonyms: sonometer |
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| audiometry | (noun) measuring sensitivity of hearing | - |
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| (noun) the measurement of hearing | Synonyms: audiology |
| autosome | (noun) any chromosome that is not a sex chromosome; appear in pairs in body cells but as single chromosomes in spermatozoa | Synonyms: somatic chromosome |
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| barometer | (noun) an instrument that measures atmospheric pressure | - |
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| bathometer | (noun) an instrument that measures the depth of water | Synonyms: bathymeter |
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| biome | (noun) a major biotic community characterized by the dominant forms of plant life and the prevailing climate | - |
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| biomedicine | (noun) the branch of medical science that studies the ability of organisms to withstand environmental stress (as in space travel) | - |
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| (noun) the branch of medical science that applies biological and physiological principles to clinical practice | - |
| biometrics | (noun) a branch of biology that studies biological phenomena and observations by means of statistical analysis | Synonyms: biometry, biostatistics |
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| biometry | (noun) a branch of biology that studies biological phenomena and observations by means of statistical analysis | Synonyms: biometrics, biostatistics |
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| blastomere | (noun) any cell resulting from cleavage of a fertilized egg | - |
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| bloomer | (noun) an embarrassing mistake | Synonyms: blooper, blunder, boner, boo-boo, botch, bungle, flub, foul-up, fuckup, pratfall |
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| (noun) a flower that blooms in a particular way | - |
| bloomers | (noun) (used in the plural) underpants worn by women | Synonyms: drawers, knickers, pants |
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| bolometer | (noun) an instrument that measures heat radiation; extremely sensitive | - |
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| boomer | (noun) a member of the baby boom generation in the 1950s | Synonyms: baby boomer |
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| boomerang | (noun) a miscalculation that recoils on its maker | Synonyms: backfire |
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| (noun) a curved piece of wood; when properly thrown will return to thrower | Synonyms: throw stick, throwing stick |
| brome | (noun) any of various woodland and meadow grasses of the genus Bromus; native to temperate regions | Synonyms: bromegrass |
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| bromegrass | (noun) any of various woodland and meadow grasses of the genus Bromus; native to temperate regions | Synonyms: brome |
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| bromeosin | (noun) a red fluorescent dye resulting from the action of bromine on fluorescein; used in cosmetics and as a biological stain for studying cell structures | Synonyms: eosin |
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| burdensomeness | (noun) unwelcome burdensome difficulty | Synonyms: heaviness, onerousness, oppressiveness |
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| calomel | (noun) a tasteless colorless powder used medicinally as a cathartic | Synonyms: mercurous chloride |
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| cardiomegaly | (noun) an abnormal enlargement of the heart | Synonyms: enlarged heart, megacardia, megalocardia |
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| centromere | (noun) a specialized condensed region of each chromosome that appears during mitosis where the chromatids are held together to form an X shape | Synonyms: kinetochore |
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| centrosome | (noun) small region of cytoplasm adjacent to the nucleus; contains the centrioles and serves to organize the microtubules | Synonyms: central body |
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| cephalometry | (noun) measurement of human heads | - |
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| cerebromeningitis | (noun) inflammation of the brain and spinal cord and their meninges | Synonyms: encephalomeningitis, meningoencephalitis |
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| chondriosome | (noun) an organelle containing enzymes responsible for producing energy | Synonyms: mitochondrion |
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| chordomesoderm | (noun) the area of mesoderm that forms the notochord | Synonyms: chordamesoderm |
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| choriomeningitis | (noun) a cerebral meningitis with cellular infiltration of the meninges | - |
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| chrome | (noun) another word for chromium when it is used in dyes or pigments | - |
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| chromesthesia | (noun) a form of synesthesia in which nonvisual stimulation results in the experience of color sensations | Synonyms: chromaesthesia |
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| chromosome | (noun) a threadlike strand of DNA in the cell nucleus that carries the genes in a linear order | - |
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| chronometer | (noun) an accurate clock (especially used in navigation) | - |
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| chrysomelid | (noun) brightly colored beetle that feeds on plant leaves; larvae infest roots and stems | Synonyms: leaf beetle |
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| cleome | (noun) any of various often strong-smelling plants of the genus Cleome having showy spider-shaped flowers | Synonyms: spiderflower |
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| clinometer | (noun) an instrument used by surveyors in order to measure an angle of inclination or elevation | Synonyms: inclinometer |
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| cognomen | (noun) the name used to identify the members of a family (as distinguished from each member's given name) | Synonyms: family name, last name, surname |
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| (noun) a familiar name for a person (often a shortened version of a person's given name) | Synonyms: byname, moniker, nickname, sobriquet, soubriquet |
| come | (noun) the thick white fluid containing spermatozoa that is ejaculated by the male genital tract | Synonyms: cum, ejaculate, seed, semen, seminal fluid |
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| comeback | (noun) return by a celebrity to some previously successful activity | - |
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| (noun) a quick reply to a question or remark (especially a witty or critical one) | Synonyms: counter, rejoinder, replication, retort, return, riposte |
| comedian | (noun) a professional performer who tells jokes and performs comical acts | Synonyms: comic |
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| (noun) an actor in a comedy | - |
| comedienne | (noun) a female comedian | - |
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| (noun) a female actor in a comedy | - |
| comedo | (noun) a black-tipped plug clogging a pore of the skin | Synonyms: blackhead |
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| comedogen | (noun) A substance that tends to produce acne, such as by clogging pores on the skin. | Synonyms: comedogenic, comedogenic substance |
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| comedogenic | (noun) A substance that tends to produce acne, such as by clogging pores on the skin. | Synonyms: comedogen, comedogenic substance |
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| comedown | (noun) decline to a lower status or level | - |
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| comedy | (noun) light and humorous drama with a happy ending | - |
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| (noun) a comic incident or series of incidents | Synonyms: clowning, drollery, funniness |
| comeliness | (noun) the quality of being good looking and attractive | Synonyms: beauteousness, fairness, loveliness |
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| comer | (noun) someone who arrives (or has arrived) | Synonyms: arrival, arriver |
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| (noun) someone with a promising future | - |
| comestible | (noun) any substance that can be used as food | Synonyms: eatable, edible, pabulum, victual, victuals |
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| comet | (noun) (astronomy) a relatively small extraterrestrial body consisting of a frozen mass that travels around the sun in a highly elliptical orbit | - |
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| comeupance | (noun) an outcome (good or bad) that is well deserved and fitting | Synonyms: comeuppance, just deserts, poetic justice |
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| comeuppance | (noun) an outcome (good or bad) that is well deserved and fitting | Synonyms: comeupance, just deserts, poetic justice |
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| conglomerate | (noun) a group of diverse companies under common ownership and run as a single organization | Synonyms: empire |
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| (noun) a composite rock made up of particles of varying size | Synonyms: pudding stone |
| conglomeration | (noun) an occurrence combining miscellaneous things into a (more or less) rounded mass | Synonyms: conglobation |
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| (noun) a sum total of many heterogenous things taken together | Synonyms: aggregate, congeries |
| (noun) a rounded spherical form | Synonyms: conglobation |
| craniometer | (noun) an instrument for measuring skull sizes | - |
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| craniometry | (noun) the branch of physical anthropology dealing with the study and measurement of dry skulls after removal of its soft parts | - |
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| cryometer | (noun) a thermometer designed to measure low temperatures | - |
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| cumbersomeness | (noun) trouble in carrying or managing caused by bulk or shape | Synonyms: awkwardness, unwieldiness |
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| customer | (noun) someone who pays for goods or services | Synonyms: client |
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| cyclostome | (noun) primitive aquatic vertebrate | - |
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| cytochrome | (noun) (biochemistry) a class of hemoprotein whose principal biological function is electron transfer (especially in cellular respiration) | - |
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| cytomegalovirus | (noun) any of a group of herpes viruses that enlarge epithelial cells and can cause birth defects; can affect humans with impaired immunological systems | Synonyms: CMV |
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| cytomembrane | (noun) a thin membrane (a double layer of lipids) enclosing the cytoplasm of a cell; proteins in the membrane control passage of ions (like sodium or potassium or calcium) in and out of the cell | Synonyms: cell membrane, plasma membrane |
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| cytophotometer | (noun) a photometer that can be used to locate and identify chemical compounds in a cell by measuring the intensity of the light that passes through stained sections of the cytoplasm | - |
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| cytophotometry | (noun) the study of chemical compounds inside a cell by means of a cytophotometer | - |
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| cytostome | (noun) mouth of a protozoan | - |
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| dactylomegaly | (noun) abnormally large fingers or toes | - |
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| declinometer | (noun) an instrument for measuring magnetic declination | Synonyms: transit declinometer |
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