| 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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| 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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| 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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| 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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| 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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| 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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| 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 |
| 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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| 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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| 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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| 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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| 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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| feterita | (noun) a Sudanese sorghum having exceptionally large soft white grains | Synonyms: federita, Sorghum vulgare caudatum |
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| fluxmeter | (noun) meter that measures magnetic flux by the current it generates in a coil | - |
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| galvanometer | (noun) meter for detecting or comparing or measuring small electric currents | - |
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| gasometer | (noun) a large gas-tight spherical or cylindrical tank for holding gas to be used as fuel | Synonyms: gas holder |
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| (noun) a meter for measuring the amount of gas flowing through a particular pipe | Synonyms: gas meter |
| gaussmeter | (noun) a meter to compare strengths of magnetic fields | Synonyms: magnetometer |
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| geometer | (noun) a mathematician specializing in geometry | Synonyms: geometrician |
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| goniometer | (noun) direction finder that determines the angular direction of incoming radio signals | - |
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| gravimeter | (noun) a measuring instrument for determining the specific gravity of a liquid or solid | Synonyms: hydrometer |
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| (noun) a measuring instrument for measuring variations in the gravitational field of the earth | Synonyms: gravity meter |
| greeter | (noun) a person who greets | Synonyms: saluter, welcomer |
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| hectometer | (noun) a metric unit of length equal to 100 meters | Synonyms: hectometre, hm |
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| heliometer | (noun) an instrument used to measure the angular separation of two stars that are too far apart to be included in the field of view of an ordinary telescope | - |
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| heterocycle | (noun) a ring of atoms of more than one kind; especially a ring of carbon atoms containing at least one atom that is not carbon | Synonyms: heterocyclic ring |
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| (noun) a compound containing a heterocyclic ring | Synonyms: heterocyclic, heterocyclic compound |
| heterocyclic | (noun) a compound containing a heterocyclic ring | Synonyms: heterocycle, heterocyclic compound |
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| heterodoxy | (noun) the quality of being unorthodox | Synonyms: unorthodoxy |
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| (noun) any opinions or doctrines at variance with the official or orthodox position | Synonyms: heresy, unorthodoxy |
| heterogeneity | (noun) the quality of being diverse and not comparable in kind | Synonyms: heterogeneousness |
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| heterogeneousness | (noun) the quality of being diverse and not comparable in kind | Synonyms: heterogeneity |
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| heterogenesis | (noun) the alternation of two or more different forms in the life cycle of a plant or animal | Synonyms: alternation of generations, xenogenesis |
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| heterogloss | (noun) the locative boundary of a certain linguistic feature, such as the pronunciation of a vowel, the meaning of a word, or use of some syntactic feature. | Synonyms: isogloss |
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| heterograft | (noun) tissue from an animal of one species used as a temporary graft (as in cases of severe burns) on an individual of another species | Synonyms: xenograft |
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| heterology | (noun) (biology) the lack of correspondence of apparently similar body parts | - |
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| heterometabolism | (noun) development of insects with incomplete metamorphosis in which no pupal stage precedes maturity | Synonyms: heterometaboly |
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| heterometaboly | (noun) development of insects with incomplete metamorphosis in which no pupal stage precedes maturity | Synonyms: heterometabolism |
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| heteronym | (noun) two words are heteronyms if they are spelled the same way but differ in pronunciation | - |
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| heteroploid | (noun) (genetics) an organism or cell having a chromosome number that is not an even multiple of the haploid chromosome number for that species | - |
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| heteroploidy | (noun) the condition of being heteroploid | - |
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| heterosexism | (noun) discrimination in favor of heterosexual and against homosexual people | - |
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| heterosexual | (noun) a person having a sexual orientation to persons of the opposite sex | Synonyms: heterosexual person, straight, straight person |
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| heterosexualism | (noun) a sexual attraction to (or sexual relations with) persons of the opposite sex | Synonyms: heterosexuality, straightness |
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| heterosexuality | (noun) a sexual attraction to (or sexual relations with) persons of the opposite sex | Synonyms: heterosexualism, straightness |
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| heterosis | (noun) (genetics) the tendency of a crossbred organism to have qualities superior to those of either parent | Synonyms: hybrid vigor |
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| heterospory | (noun) the development of both microspores and megaspores | - |
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| heterostracan | (noun) extinct jawless fish with the anterior part of the body covered with bony plates; of the Silurian and Devonian | - |
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| heterotaxy | (noun) any abnormal position of the organs of the body | Synonyms: transposition |
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| heterotroph | (noun) an organism that depends on complex organic substances for nutrition | - |
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| heterozygosity | (noun) the state of being heterozygous; having two different alleles of the same gene | - |
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| heterozygote | (noun) (genetics) an organism having two different alleles of a particular gene and so giving rise to varying offspring | - |
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