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Glossary · Nouns · F

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TermTypeDefinitionClassificationsUpdated
Fly HoneysucklenounMWEerect deciduous North American shrub with yellow-white flowersverifiedMay 18, 2026
Fly in the OintmentnounMWEan inconvenience that detracts from the usefulness of somethingverifiedMay 18, 2026
Fly OrchidnounMWEany of several dwarf creeping orchids with small bizarre insect-like hairy flowers on slender stalksverifiedMay 18, 2026
Fly PoisonnounMWEall parts of plant are highly toxicverifiedMay 18, 2026
Fly RodnounMWEa long flexible fishing rod used in fly fishingverifiedMay 18, 2026
Fly SheetnounMWEflap consisting of a piece of canvas that can be drawn back to provide entrance to a tentverifiedMay 18, 2026
Fly TentnounMWEa tent with a fly frontverifiedMay 18, 2026
Fly-Bynouna flight at a low altitude (usually of military aircraft) over spectators on the groundverifiedMay 18, 2026
Fly-Fishingnounangling with an artificial fly as a lureverifiedMay 18, 2026
Flybridgenounthe highest navigational bridge on a shipverifiedMay 18, 2026
Flycatchernounany of a large group of small songbirds that feed on insects taken on the wingverifiedMay 18, 2026
Flycatching WarblernounMWEany of numerous American wood warblers that feed on insects caught on the wingverifiedMay 18, 2026
Flyernounan advertisement (usually printed on a page or in a leaflet) intended for wide distributionverifiedMay 18, 2026
Flying BirdnounMWEbirds having keeled breastbones for attachment of flight musclesverifiedMay 18, 2026
Flying BoatnounMWEa large seaplane that floats with its fuselage in the water rather than on pontoonsverifiedMay 18, 2026
Flying BombnounMWEa small jet-propelled winged missile that carries a bombverifiedMay 18, 2026
Flying BridgenounMWEthe highest navigational bridge on a shipverifiedMay 18, 2026
Flying ButtressnounMWEa buttress that stands apart from the main structure and connected to it by an archverifiedMay 18, 2026
Flying CarpetnounMWEan imaginary carpet that will fly people anywhere they wish to go, found in some Middle Eastern folk talesverifiedMay 18, 2026
Flying CatnounMWEarboreal nocturnal mammal of southeast Asia and the Philippines resembling a lemur and having a fold of skin on each side from neck to tail that is used for long gliding leapsverifiedMay 18, 2026
Flying ColorsnounMWEcomplete successverifiedMay 18, 2026
Flying ColoursnounMWEcomplete successverifiedMay 18, 2026
Flying DragonnounMWEany of several small tropical Asian lizards capable of gliding by spreading winglike membranes on each side of the bodyverifiedMay 18, 2026
Flying DrainpipenounMWEa simple type of jet engineverifiedMay 18, 2026
Flying FieldnounMWEa place where planes take off and landverifiedMay 18, 2026
Flying FishnounMWEtropical marine fishes having enlarged winglike fins used for brief gliding flightverifiedMay 18, 2026
Flying FoxnounMWElarge bat with a head that resembles the head of a foxverifiedMay 18, 2026
Flying GeckonounMWEa gecko that has membranous expansions along the sides of its body and limbs and tail that enable it to glide short distancesverifiedMay 18, 2026
Flying GurnardnounMWEtropical fish with huge fanlike pectoral fins for underwater glidingverifiedMay 18, 2026
Flying JibnounMWEthe outermost of two or more jibsverifiedMay 18, 2026
Flying LemurnounMWEarboreal nocturnal mammal of southeast Asia and the Philippines resembling a lemur and having a fold of skin on each side from neck to tail that is used for long gliding leapsverifiedMay 18, 2026
Flying LizardnounMWEany of several small tropical Asian lizards capable of gliding by spreading winglike membranes on each side of the bodyverifiedMay 18, 2026
Flying MarenounMWEa wrestling maneuververifiedMay 18, 2026
Flying MarmotnounMWEEast Indian flying squirrelverifiedMay 18, 2026
Flying MousenounMWEtiny flying phalangerverifiedMay 18, 2026
Flying OpossumnounMWEnocturnal phalangers that move with gliding leaps using parachute-like folds of skin along the sides of the bodyverifiedMay 18, 2026
Flying PhalangernounMWEnocturnal phalangers that move with gliding leaps using parachute-like folds of skin along the sides of the bodyverifiedMay 18, 2026
Flying ReptilenounMWEan extinct reptile of the Jurassic and Cretaceous having a bird-like beak and membranous wings supported by the very long fourth digit of each forelimbverifiedMay 18, 2026
Flying RobinnounMWEtropical fish with huge fanlike pectoral fins for underwater glidingverifiedMay 18, 2026
Flying SaucernounMWEan (apparently) flying object whose nature is unknownverifiedMay 18, 2026
Flying SchoolnounMWEa school for teaching students to fly airplanesverifiedMay 18, 2026
Flying SquadnounMWEa mobile group of trained people (police or executives or officials) able to move quickly in the case of emergenciesverifiedMay 18, 2026
Flying SquirrelnounMWEnocturnal phalangers that move with gliding leaps using parachute-like folds of skin along the sides of the bodyverifiedMay 18, 2026
Flying StartnounMWEa racing start in which the contestants are already in full motion when they pass the starting lineverifiedMay 18, 2026
Flying VisitnounMWEa visit that last for only a very short timeverifiedMay 18, 2026
Flyleafnouna blank leaf in the front or back of a bookverifiedMay 18, 2026
Flyovernouna flight at a low altitude (usually of military aircraft) over spectators on the groundverifiedMay 18, 2026
Flypapernounpaper that is poisoned or coated with a sticky substance to kill fliesverifiedMay 18, 2026
Flypastnouna flight at a low altitude (usually of military aircraft) over spectators on the groundverifiedMay 18, 2026
Flyswatnounan implement with a flat part (of mesh or plastic) and a long handleverifiedMay 18, 2026
Flyswatternounan implement with a flat part (of mesh or plastic) and a long handleverifiedMay 18, 2026
Flytrapnouna trap for catching fliesverifiedMay 18, 2026
Flywaynounthe geographic route along which birds customarily migrateverifiedMay 18, 2026
Flyweightnounan amateur boxer who weighs no more than 112 poundsverifiedMay 18, 2026
Flywheelnounregulator consisting of a heavy wheel that stores kinetic energy and smooths the operation of a reciprocating engineverifiedMay 18, 2026
FMnounmodulation of the frequency of the (radio) carrier waveverifiedMay 18, 2026
Fmrinouna form of magnetic resonance imaging of the brain that registers blood flow to functioning areas of the brainverifiedMay 18, 2026
Fo'c'slenounliving quarters consisting of a superstructure in the bow of a merchant ship where the crew is housedverifiedMay 18, 2026
Foam RubbernounMWEspongy rubberverifiedMay 18, 2026
Foamflowernounstoloniferous white-flowered spring-blooming woodland plantverifiedMay 18, 2026
Foaminessnounthe property of being foamyverifiedMay 18, 2026
Focal DistancenounMWEthe distance from a lens to its focusverifiedMay 18, 2026
Focal EpilepsynounMWEepilepsy in which the attacks begins with an isolated disturbance of cerebral function (as a twitching of a limb or an illusory sensation or a mental disturbance)verifiedMay 18, 2026
Focal InfectionnounMWEbacterial infection limited to a specific organ or region especially one causing symptoms elsewhereverifiedMay 18, 2026
Focal LengthnounMWEthe distance from a lens to its focusverifiedMay 18, 2026
Focal PointnounMWEa point of convergence of light (or other radiation) or a point from which it divergesverifiedMay 18, 2026
Focal RationounMWEthe ratio of the focal length to the diameter of a (camera) lens systemverifiedMay 18, 2026
Focal SeizurenounMWEtransitory disturbance in motor or sensory function resulting from abnormal cortical activityverifiedMay 18, 2026
Focalisationnounthe confinement of an infection to a limited areaverifiedMay 18, 2026
Focalizationnounthe confinement of an infection to a limited areaverifiedMay 18, 2026
Focused TestingnounMWEA test methodology that assumes some knowledge of the internal structure and implementation detail of the assessment object. Also known as gray box testing.ProcessMay 12, 2026
Focusingnounthe concentration of attention or energy on somethingverifiedMay 18, 2026
Focussingnounthe concentration of attention or energy on somethingverifiedMay 18, 2026
Foenounan armed adversary (especially a member of an opposing military force)verifiedMay 18, 2026
Foehnnouna warm dry wind that blows down the northern slopes of the AlpsverifiedMay 18, 2026
Foemannounan armed adversary (especially a member of an opposing military force)verifiedMay 18, 2026
Foetal CirculationnounMWEthe system of blood vessels and structures through which blood moves in a fetusverifiedMay 18, 2026
Foetal DistressnounMWEan abnormal condition of a fetusverifiedMay 18, 2026
Foetal MonitornounMWEan electronic monitor that monitors fetal heartbeat and the mother's uterine contractions during childbirthverifiedMay 18, 2026
Foetid BugbanenounMWEbugbane of Siberia and eastern Asia having ill-smelling green-white flowersverifiedMay 18, 2026
Foetid PothosnounMWEdeciduous perennial low-growing fetid swamp plant of eastern North America having minute flowers enclosed in a mottled greenish or purple cowl-shaped spatheverifiedMay 18, 2026
Foetologynounthe branch of medicine concerned with the fetus in the uterusverifiedMay 18, 2026
Foetometrynounmeasurement of a fetus (especially the diameter of the head)verifiedMay 18, 2026
Foetoproteinnounany of several antigens that occur naturally in the fetus and sometimes in adults with cancerverifiedMay 18, 2026
Foetornouna distinctive odor that is offensively unpleasantverifiedMay 18, 2026
Foetoscopenouna stethoscope placed on the pregnant woman's abdomen to listen for the fetal heartbeatverifiedMay 18, 2026
Foetoscopynounprenatal diagnosis that allows direct observation of a fetus in the uterus and the withdrawal of fetal bloodverifiedMay 18, 2026
Foetusnounan unborn or unhatched vertebrate in the later stages of development showing the main recognizable features of the mature animalverifiedMay 18, 2026
Fogbanknouna large mass of fog on the sea (as seen from a distance)verifiedMay 18, 2026
Fogeynounsomeone whose style is out of fashionverifiedMay 18, 2026
Fogginessnounan atmosphere in which visibility is reduced because of a cloud of some substanceverifiedMay 18, 2026
Foghornnouna warning device consisting of a horn that generates a loud low toneverifiedMay 18, 2026
Foglampnounheadlight that provides strong beam for use in foggy weatherverifiedMay 18, 2026
Fogsignalnouna loud low warning signal that can be heard by fogbound shipsverifiedMay 18, 2026
Fogynounsomeone whose style is out of fashionverifiedMay 18, 2026
Fohnnouna warm dry wind that blows down the northern slopes of the AlpsverifiedMay 18, 2026
Foiblenouna behavioral attribute that is distinctive and peculiar to an individualverifiedMay 18, 2026
Foie GrasnounMWEa pate made from goose liver (marinated in Cognac) and trufflesverifiedMay 18, 2026
Foilingnounan act of hindering someone's plans or effortsverifiedMay 18, 2026
Folacinnouna B vitamin that is essential for cell growth and reproductionverifiedMay 18, 2026