| accelerometer | (noun) an instrument for measuring the acceleration of aircraft or rockets | - |
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| actinometer | (noun) an instrument for measuring the intensity of electromagnetic radiation (usually by the photochemical effect) | - |
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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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| aesthete | (noun) one who professes great sensitivity to the beauty of art and nature | Synonyms: esthete |
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| agamete | (noun) an asexual reproductive cell | - |
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| algometer | (noun) device for measuring pain caused by pressure | - |
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| altimeter | (noun) an instrument that measures the height above ground; used in navigation | - |
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| ammeter | (noun) a meter that measures the flow of electrical current in amperes | - |
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| 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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| anisogamete | (noun) either of a pair of unlike gametes especially those unlike in size | - |
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| appetence | (noun) a feeling of craving something | Synonyms: appetency, appetite |
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| appetency | (noun) a feeling of craving something | Synonyms: appetence, appetite |
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| arete | (noun) a sharp narrow ridge found in rugged mountains | - |
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| ascomycete | (noun) any fungus of the class Ascomycetes (or subdivision Ascomycota) in which the spores are formed inside an ascus | Synonyms: ascomycetous fungus |
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| athlete | (noun) a person trained to compete in sports | Synonyms: jock |
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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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| barometer | (noun) an instrument that measures atmospheric pressure | - |
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| basidiomycete | (noun) any of various fungi of the subdivision Basidiomycota | Synonyms: basidiomycetous fungi |
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| basketeer | (noun) an athlete who plays basketball | Synonyms: basketball player, cager |
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| bathometer | (noun) an instrument that measures the depth of water | Synonyms: bathymeter |
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| bathymeter | (noun) an instrument that measures the depth of water | Synonyms: bathometer |
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| betel | (noun) Asian pepper plant whose leaves are chewed with betel nut (seed of the betel palm) by southeast Asians | Synonyms: betel pepper, Piper betel |
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| (noun) a leaf of a vine from the betel pepper | Synonyms: betel leaf |
| blastomycete | (noun) any of various yeastlike budding fungi of the genus Blastomyces; cause disease in humans and other animals | - |
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| bolete | (noun) any fungus of the family Boletaceae | - |
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| bolometer | (noun) an instrument that measures heat radiation; extremely sensitive | - |
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| cafeteria | (noun) a restaurant where you serve yourself and pay a cashier | - |
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| calorimeter | (noun) a measuring instrument that determines quantities of heat | - |
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| casquetel | (noun) a light open casque without a visor or beaver | Synonyms: casquet |
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| catheter | (noun) a thin flexible tube inserted into the body to permit introduction or withdrawal of fluids or to keep the passageway open | - |
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| catheterisation | (noun) the operation of introducing a catheter into the body | Synonyms: catheterization |
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| catheterization | (noun) the operation of introducing a catheter into the body | Synonyms: catheterisation |
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| cemetery | (noun) a tract of land used for burials | Synonyms: burial ground, burial site, burying ground, graveyard, memorial park, necropolis |
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| centimeter | (noun) a metric unit of length equal to one hundredth of a meter | Synonyms: centimetre, cm |
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| chronometer | (noun) an accurate clock (especially used in navigation) | - |
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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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| colorimeter | (noun) a measuring instrument used in colorimetric analysis to determine the quantity of a substance from the color it yields with specific reagents | Synonyms: tintometer |
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| competence | (noun) the quality of being adequately or well qualified physically and intellectually | Synonyms: competency |
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| competency | (noun) the quality of being adequately or well qualified physically and intellectually | Synonyms: competence |
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| completeness | (noun) (logic) an attribute of a logical system that is so constituted that a contradiction arises if any proposition is introduced that cannot be derived from the axioms of the system | - |
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| (noun) the state of being complete and entire; having everything that is needed | - |
| concrete | (noun) a strong hard building material composed of sand and gravel and cement and water | - |
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| concreteness | (noun) the quality of being concrete (not abstract) | - |
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| contretemps | (noun) an awkward clash | - |
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| craniometer | (noun) an instrument for measuring skull sizes | - |
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| cricketer | (noun) an athlete who plays cricket | - |
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| cryometer | (noun) a thermometer designed to measure low temperatures | - |
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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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| dasymeter | (noun) densimeter consisting of a thin glass globe that is weighed in a gas to determine its density | - |
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| decameter | (noun) a metric unit of length equal to ten meters | Synonyms: dam, decametre, dekameter, dekametre, dkm |
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| decimeter | (noun) a metric unit of length equal to one tenth of a meter | Synonyms: decimetre, dm |
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| declinometer | (noun) an instrument for measuring magnetic declination | Synonyms: transit declinometer |
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| dekameter | (noun) a metric unit of length equal to ten meters | Synonyms: dam, decameter, decametre, dekametre, dkm |
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| densimeter | (noun) a measuring instrument for determining density or specific gravity | Synonyms: densitometer |
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| densitometer | (noun) a measuring instrument for determining optical or photographic density | - |
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| (noun) a measuring instrument for determining density or specific gravity | Synonyms: densimeter |
| detectability | (noun) The state of being noticeable. | - |
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| detecting | (noun) a police investigation to determine the perpetrator | Synonyms: detection, detective work, sleuthing |
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| detection | (noun) the act of detecting something; catching sight of something | Synonyms: catching, espial, spotting, spying |
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| (noun) a police investigation to determine the perpetrator | Synonyms: detecting, detective work, sleuthing |
| (noun) the perception that something has occurred or some state exists | Synonyms: sensing |
| (noun) the detection that a signal is being received | Synonyms: signal detection |
| detective | (noun) a police officer who investigates crimes | Synonyms: investigator, police detective, tec |
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| (noun) an investigator engaged or employed in obtaining information not easily available to the public | - |
| detector | (noun) any device that receives a signal or stimulus (as heat or pressure or light or motion etc.) and responds to it in a distinctive manner | Synonyms: sensing element, sensor |
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| (noun) electronic equipment that detects the presence of radio signals or radioactivity | - |
| (noun) rectifier that extracts modulation from a radio carrier wave | Synonyms: demodulator |
| detent | (noun) a hinged catch that fits into a notch of a ratchet to move a wheel forward or prevent it from moving backward | Synonyms: click, dog, pawl |
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| detente | (noun) the easing of tensions or strained relations (especially between nations) | - |
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| detention | (noun) a punishment in which a student must stay at school after others have gone home | - |
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| (noun) a state of being confined (usually for a short time) | Synonyms: custody, detainment, hold |
| detergence | (noun) detergent quality; the quality of having cleansing power | Synonyms: detergency |
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| detergency | (noun) detergent quality; the quality of having cleansing power | Synonyms: detergence |
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| detergent | (noun) a cleansing agent that differs from soap but can also emulsify oils and hold dirt in suspension | - |
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| (noun) a surface-active chemical widely used in industry and laundering | - |
| deterioration | (noun) process of changing to an inferior state | Synonyms: declension, decline in quality, worsening |
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| (noun) a symptom of reduced quality or strength | Synonyms: impairment |
| determent | (noun) a communication that makes you afraid to try something | Synonyms: deterrence, intimidation |
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| determinant | (noun) a determining or causal element or factor | Synonyms: causal factor, determinative, determiner, determining factor |
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| (noun) a square matrix used to solve simultaneous equations | - |
| (noun) the site on the surface of an antigen molecule to which an antibody attaches itself | Synonyms: antigenic determinant, epitope |
| determinateness | (noun) the quality of being predictable with great confidence | Synonyms: definiteness |
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| determination | (noun) the act of determining the properties of something, usually by research or calculation | Synonyms: finding |
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| (noun) the act of making up your mind about something | Synonyms: conclusion, decision |
| (noun) the quality of being determined to do or achieve something; firmness of purpose | Synonyms: purpose |
| (noun) a position or opinion or judgment reached after consideration | Synonyms: conclusion, decision |
| (noun) deciding or controlling something's outcome or nature | - |
| determinative | (noun) a determining or causal element or factor | Synonyms: causal factor, determinant, determiner, determining factor |
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| (noun) one of a limited class of noun modifiers that determine the referents of noun phrases | Synonyms: determiner |
| determiner | (noun) a determining or causal element or factor | Synonyms: causal factor, determinant, determinative, determining factor |
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| (noun) one of a limited class of noun modifiers that determine the referents of noun phrases | Synonyms: determinative |
| (noun) an argument that is conclusive | Synonyms: clincher, determining factor |
| determinism | (noun) (philosophy) a philosophical theory holding that all events are inevitable consequences of antecedent sufficient causes; often understood as denying the possibility of free will | - |
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| determinist | (noun) anyone who submits to the belief that they are powerless to change their destiny | Synonyms: fatalist, predestinarian, predestinationist |
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| deterrence | (noun) the act or process of discouraging actions or preventing occurrences by instilling fear or doubt or anxiety | - |
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| (noun) a communication that makes you afraid to try something | Synonyms: determent, intimidation |
| (noun) a negative motivational influence | Synonyms: disincentive |
| deterrent | (noun) something immaterial that interferes with or delays action or progress | Synonyms: balk, baulk, check, handicap, hinderance, hindrance, impediment |
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| detestation | (noun) hate coupled with disgust | Synonyms: abhorrence, abomination, execration, loathing, odium |
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| diabetes | (noun) a polygenic disease characterized by abnormally high glucose levels in the blood; any of several metabolic disorders marked by excessive urination and persistent thirst | - |
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| diameter | (noun) the length of a straight line passing through the center of a circle and connecting two points on the circumference | Synonyms: diam |
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| (noun) a straight line connecting the center of a circle with two points on its perimeter (or the center of a sphere with two points on its surface) | - |
| dieter | (noun) a person who diets | - |
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| dietetics | (noun) the scientific study of food preparation and intake | - |
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| discomycete | (noun) any fungus that is a member of the subclass Discomycetes | Synonyms: cup fungus |
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| discreteness | (noun) the state of being several and distinct | Synonyms: distinctness, separateness, severalty |
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| dosemeter | (noun) a measuring instrument for measuring doses of ionizing radiation (X-rays or radioactivity) | Synonyms: dosimeter |
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| dosimeter | (noun) a measuring instrument for measuring doses of ionizing radiation (X-rays or radioactivity) | Synonyms: dosemeter |
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| durometer | (noun) An instrument for measuring the degree of hardness; especially, an instrument for testing the relative hardness of steel rails and the like. | - |
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| dynamometer | (noun) measuring instrument designed to measure power | Synonyms: ergometer |
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| electrodynamometer | (noun) measuring instrument that uses the interaction of the magnetic fields of two coils to measure current or voltage or power | - |
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| electrometer | (noun) meter to measure electrostatic voltage differences; draws no current from the source | - |
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| ergometer | (noun) measuring instrument designed to measure power | Synonyms: dynamometer |
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| eriometer | (noun) An instrument for measuring the diameters of minute particles or fibers, from the size of the colored rings produced by the diffraction of the light in which the objects are viewed. | - |
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| esthete | (noun) one who professes great sensitivity to the beauty of art and nature | Synonyms: aesthete |
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| etcetera | (noun) additional unspecified odds and ends; more of the same; entity, other pronoun; pronoun, entity; quantifier: other | - |
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| eternity | (noun) a state of eternal existence believed in some religions to characterize the afterlife | Synonyms: timeless existence, timelessness |
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| (noun) time without end | Synonyms: infinity |
| (noun) a seemingly endless time interval (waiting) | - |
| eudiometer | (noun) measuring instrument consisting of a graduated glass tube for measuring volume changes in chemical reactions between gases | - |
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| evaporometer | (noun) an instrument that measures rate of evaporation of water | Synonyms: atmometer |
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| exegete | (noun) a person skilled in exegesis (especially of religious texts) | - |
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| fathometer | (noun) depth finder for determining depth of water or a submerged object by means of ultrasound waves | Synonyms: sonic depth finder |
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| femtometer | (noun) a metric unit of length equal to one quadrillionth of a meter | Synonyms: femtometre, fermi |
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