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Glossary · Nouns · F

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TermTypeDefinitionClassificationsUpdated
Flowering HazelnounMWEany of several Asiatic deciduous shrubs cultivated for their nodding racemes of yellow flowers that appear before the leavesverifiedMay 18, 2026
Flowering MaplenounMWEan ornamental plant of the genus Abutilon having leaves that resemble maple leavesverifiedMay 18, 2026
Flowering OnionnounMWEEuropean onion with white flowersverifiedMay 18, 2026
Flowering PlantnounMWEplants having seeds in a closed ovaryverifiedMay 18, 2026
Flowering QuincenounMWEAsiatic ornamental shrub with spiny branches and pink or red blossomsverifiedMay 18, 2026
Flowering RaspberrynounMWEshrubby raspberry of eastern North America having showy rose to purplish flowers and red or orange thimble-shaped fruitverifiedMay 18, 2026
Flowering ShrubnounMWEshrub noted primarily for its flowersverifiedMay 18, 2026
Flowering SpurgenounMWEcommon perennial United States spurge having showy white petallike bractsverifiedMay 18, 2026
Flowering StonenounMWEany plant of the genus Lithops native to Africa having solitary yellow or white flowers and thick leaves that resemble stonesverifiedMay 18, 2026
Flowering TobacconounMWESouth American ornamental perennial having nocturnally fragrant greenish-white flowersverifiedMay 18, 2026
Flowering TreenounMWEany tree having seeds and ovules contained in the ovaryverifiedMay 18, 2026
Flowering WintergreennounMWEcommon trailing perennial milkwort of eastern North America having leaves like wintergreen and usually rosy-purple flowers with winged sepalsverifiedMay 18, 2026
Flowerpotnouna container in which plants are cultivatedverifiedMay 18, 2026
Flowers of ZincnounMWEoxide of zincverifiedMay 18, 2026
Flowers-Of-An-Hournounannual weedy herb with ephemeral yellow purple-eyed flowersverifiedMay 18, 2026
Floxuridinenounantineoplastic drug used to treat some cancersverifiedMay 18, 2026
Flunounan acute febrile highly contagious viral diseaseverifiedMay 18, 2026
Fluctuationnounthe quality of being unsteady and subject to changesverifiedMay 18, 2026
Fluenounorgan pipe whose tone is produced by air passing across the sharp edge of a fissure or lipverifiedMay 18, 2026
Flue PipenounMWEorgan pipe whose tone is produced by air passing across the sharp edge of a fissure or lipverifiedMay 18, 2026
Flue StopnounMWEan organ stop with the tone of a flue pipeverifiedMay 18, 2026
Fluegelhornnouna brass instrument resembling a cornet but with a wider boreverifiedMay 18, 2026
Fluencynounthe quality of being facile in speech and writingverifiedMay 18, 2026
Fluent AphasianounMWEaphasia characterized by fluent but meaningless speech and severe impairment of the ability understand spoken or written wordsverifiedMay 18, 2026
Fluffinessnouna light softnessverifiedMay 18, 2026
Fluffy OmeletnounMWEsouffle-like omelet made by beating and adding the whites separatelyverifiedMay 18, 2026
Flugelhornnouna brass instrument resembling a cornet but with a wider boreverifiedMay 18, 2026
Fluid DrachmnounMWEa British imperial capacity measure (liquid or dry) equal to 60 minims or 3.5516 cubic centimetersverifiedMay 18, 2026
Fluid DramnounMWEa British imperial capacity measure (liquid or dry) equal to 60 minims or 3.5516 cubic centimetersverifiedMay 18, 2026
Fluid DrivenounMWEan automotive power couplingverifiedMay 18, 2026
Fluid FlywheelnounMWEa kind of fluid coupling in which the flywheel is the driving rotorverifiedMay 18, 2026
Fluid MechanicsnounMWEstudy of the mechanics of fluidsverifiedMay 18, 2026
Fluiditynounthe property of flowing easilyverifiedMay 18, 2026
Fluidnessnounthe property of flowing easilyverifiedMay 18, 2026
Fluidouncenouna British imperial unit of capacity or volume (liquid or dry) equal to 8 fluid drams or 28.416 cubic centimeters (1.734 cubic inches)verifiedMay 18, 2026
Fluidramnouna British imperial capacity measure (liquid or dry) equal to 60 minims or 3.5516 cubic centimetersverifiedMay 18, 2026
Flukenounparasitic flatworms having external suckers for attaching to a hostverifiedMay 18, 2026
Flumenounwatercourse that consists of an open artificial chute filled with water for power or for carrying logsverifiedMay 18, 2026
Flummerynouna bland custard or pudding especially of oatmealverifiedMay 18, 2026
Flunitrazepannouna depressant and tranquilizer (trade name Rohypnol) often used in the commission of sexual assaultverifiedMay 18, 2026
Flunkeynouna male servant (especially a footman)verifiedMay 18, 2026
Flunkynouna male servant (especially a footman)verifiedMay 18, 2026
Fluornouna soft mineral (calcium fluoride) that is fluorescent in ultraviolet lightverifiedMay 18, 2026
Fluorapatitenouna form of apatite in which fluorine predominates over chlorineverifiedMay 18, 2026
Fluoresceinnouna yellow dye that is visible even when highly dilutedverifiedMay 18, 2026
Fluorescein IsocyanatenounMWEa fluorochrome commonly conjugated with antibodies for use in indirect immunofluorescenceverifiedMay 18, 2026
Fluorescein IsothiocyanatenounMWEa fluorochrome commonly conjugated with antibodies for use in indirect immunofluorescenceverifiedMay 18, 2026
Fluoresceinenouna yellow dye that is visible even when highly dilutedverifiedMay 18, 2026
Fluorescencenounlight emitted during absorption of radiation of some other (invisible) wavelengthverifiedMay 18, 2026
Fluorescence MicroscopynounMWElight microscopy in which the specimen is irradiated at wavelengths that excite fluorochromesverifiedMay 18, 2026
Fluorescent DyenounMWEa yellow dye that is visible even when highly dilutedverifiedMay 18, 2026
Fluorescent FixturenounMWEa lighting fixture that uses a fluorescent lampverifiedMay 18, 2026
Fluorescent LampnounMWElamp consisting of a tube coated on the inside with a fluorescent materialverifiedMay 18, 2026
Fluoridationnounthe addition of a fluoride to the water supply (to prevent dental decay)verifiedMay 18, 2026
Fluoridenouna salt of hydrofluoric acidverifiedMay 18, 2026
Fluoridisationnounthe addition of a fluoride to the water supply (to prevent dental decay)verifiedMay 18, 2026
Fluoridizationnounthe addition of a fluoride to the water supply (to prevent dental decay)verifiedMay 18, 2026
Fluorinenouna nonmetallic univalent element belonging to the halogensverifiedMay 18, 2026
Fluoritenouna soft mineral (calcium fluoride) that is fluorescent in ultraviolet lightverifiedMay 18, 2026
Fluoroboric AcidnounMWEan acid of fluorine and boronverifiedMay 18, 2026
Fluoroboridenouna salt of fluoroboric acidverifiedMay 18, 2026
Fluorocarbonnouna halocarbon in which some hydrogen atoms have been replaced by fluorineverifiedMay 18, 2026
Fluorochromenounany of various fluorescent substances used in fluorescence microscopy to stain specimensverifiedMay 18, 2026
Fluoroformnouncolorless gas haloform CHF3 (similar to chloroform)verifiedMay 18, 2026
Fluoroscopenounan X-ray machine that combines an X-ray source and a fluorescent screen to enable direct observationverifiedMay 18, 2026
Fluoroscopynounexamination of body structures using a fluoroscopeverifiedMay 18, 2026
Fluorosisnouna pathological condition resulting from an excessive intake of fluorine (usually from drinking water)verifiedMay 18, 2026
Fluorouracilnounan antimetabolite used to treat certain cancersverifiedMay 18, 2026
Fluorsparnouna soft mineral (calcium fluoride) that is fluorescent in ultraviolet lightverifiedMay 18, 2026
Fluosilicatenounsalt of fluosilicic acidverifiedMay 18, 2026
Fluosilicic AcidnounMWEan unstable poisonous corrosive acid known primarily in the form of its saltsverifiedMay 18, 2026
Fluoxetinenouna selective-serotonin reuptake inhibitor commonly prescribed as an antidepressant (trade names Prozac or Sarafem)verifiedMay 18, 2026
Fluoxetine HydrocholoridenounMWEa selective-serotonin reuptake inhibitor commonly prescribed as an antidepressant (trade names Prozac or Sarafem)verifiedMay 18, 2026
Fluphenazinenountranquilizer used to treat psychotic disordersverifiedMay 18, 2026
Flurazepamnountranquilizer (trade name Dalmane) used to treat insomniaverifiedMay 18, 2026
Flurazepam HydrochloridenounMWEtranquilizer (trade name Dalmane) used to treat insomniaverifiedMay 18, 2026
Flurbiprofennouna nonsteroidal anti-inflammatory drug (trade name Ansaid) that is administered only orallyverifiedMay 18, 2026
Flush ToiletnounMWEa toilet that is cleaned of waste by the flow of water through itverifiedMay 18, 2026
Flushless ToiletnounMWEa toilet that relies on bacteria to break down waste matter (instead of using water)verifiedMay 18, 2026
Flute GlassnounMWEa tall narrow wineglassverifiedMay 18, 2026
Flute PlayernounMWEsomeone who plays the fluteverifiedMay 18, 2026
Flutingnouna groove or furrow in cloth etc (particularly a shallow concave groove on the shaft of a column)verifiedMay 18, 2026
Flutistnounsomeone who plays the fluteverifiedMay 18, 2026
Flutter KicknounMWEa swimming kickverifiedMay 18, 2026
Flutteringnounthe motion made by flapping up and downverifiedMay 18, 2026
Fluvastatinnounleast expensive statin drug (trade name Lescol)verifiedMay 18, 2026
Flux ApplicatornounMWEan applicator for applying flux (as in soldering)verifiedMay 18, 2026
Flux DensitynounMWE(physics) the number of changes in energy flow across a given surface per unit areaverifiedMay 18, 2026
Flux Density UnitnounMWEa measure of the amount of flux per unit of cross sectional areaverifiedMay 18, 2026
Flux UnitnounMWEa measure of the strength of a magnetic field per unit areaverifiedMay 18, 2026
Fluxing LimenounMWEa white crystalline oxide used in the production of calcium hydroxideverifiedMay 18, 2026
Fluxionnouna flow or dischargeverifiedMay 18, 2026
Fluxmeternounmeter that measures magnetic flux by the current it generates in a coilverifiedMay 18, 2026
Fly AgaricnounMWEpoisonous (but rarely fatal) woodland fungus having a scarlet cap with white warts and white gillsverifiedMay 18, 2026
Fly AshnounMWEfine solid particles of ash that are carried into the air when fuel is combustedverifiedMay 18, 2026
Fly BallnounMWE(baseball) a hit that flies up in the airverifiedMay 18, 2026
Fly CastingnounMWEcasting an artificial fly as a lureverifiedMay 18, 2026
Fly FloornounMWEa narrow raised platform at the side of a stage in a theaterverifiedMay 18, 2026
Fly FrontnounMWEan opening in a garment that is closed by a zipper or by buttons concealed under a fold of clothverifiedMay 18, 2026
Fly GallerynounMWEa narrow raised platform at the side of a stage in a theaterverifiedMay 18, 2026