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English Words Starting With F

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Noun Verb Adjective Adverb Plural noun Combining form Verb (transitive)Verb (intransitive)Verb (ambitransitive)

flash memory
nounMedium
/ˌflæʃ ˈmem.ər.i/A type of non-volatile computer storage that can be electrically erased and reprogrammed, retaining data without power.
flash mob
nounverb-intransitiveverb-transitiveB2
/ˈflæʃ mɒb/A large public gathering at which people perform an unusual or seemingly random act and then quickly disperse.
flash photography
nounMedium
/flæʃ fəˈtɒɡ.rə.fi/Photography that uses a brief, intense burst of artificial light (a flash) to illuminate a subject.
flash photolysis
nounVery Low
/flæʃ fəʊˈtɒlɪsɪs/A spectroscopic technique used to study fast chemical reactions, where a short, intense flash of light produces short-lived reactive intermediates.
flash picture
nounC1
/flæʃ ˈpɪk.tʃər/A photograph taken using a brief, intense burst of artificial light, typically from a flash unit, to illuminate a dark scene.
flash point
nounB2
/ˈflæʃ pɔɪnt/The temperature at which a flammable liquid produces enough vapour to ignite in air when exposed to a source of ignition.
flash set
nounC1
/ˈflæʃ ˌset/A rapid or sudden group of events, items, or actions occurring together in quick succession.
flash smelting
nounVery Low
/ˈflæʃ ˌsmelt.ɪŋ/A pyrometallurgical process for smelting sulfide ores, especially copper and nickel, where fine, dried concentrate is injected into a hot reaction shaft where it oxidizes and melts almost instantaneously.
flash spectrum
nounVery Low
/ˈflæʃ ˈspɛk.trəm/The brief spectrum of the Sun's chromosphere, visible only for a few seconds at the very beginning or end of a total solar eclipse.
flash unit
nounC1
/ˈflæʃ ˌjuː.nɪt/A detachable device that produces a brief, intense burst of light to illuminate a subject for photography.
flash welding
nounC1/C2 (Specialized Technical)
/ˈflæʃ ˌweld.ɪŋ/A resistance welding process where an electric arc (flash) is intentionally created between the ends of the workpieces to heat them before they are forced together under pressure to form a weld.
flash-bang
adjectivenounLow-frequency (specific technical/military/police term).
/ˈflæʃ bæŋ/A type of stun grenade or similar device that produces a very bright flash of light and an extremely loud bang, designed to temporarily disorient people.
flash-forward
nounB2
/ˌflæʃ ˈfɔː.wəd/A literary or cinematic technique where the narrative jumps forward in time to show events that happen later.
flash-freeze
verb-transitiveC1
/ˈflæʃ friːz/To rapidly freeze food or other perishable items using very low temperatures in order to preserve texture, flavour, and quality by minimizing ice crystal formation.
flash-lock
nounVery Rare / Historical
/ˈflæʃ ˌlɒk/A temporary, simple lock or weir on a river, used historically to raise water levels quickly for navigation, typically by placing removable boards across a gap.
flashback
nounverbB2
/ˈflæʃbæk/A sudden, vivid memory of a past event, often triggered by a sensory experience in the present.
flashboard
nounRare
/ˈflɑːʃbɔːd/A removable board or plank placed on top of a dam or weir to control the water level, especially in a millrace.
flashbulb
nounB2
/ˈflæʃbʌlb/A small electric lamp that produces a very bright flash of light for a very short time, used in photography.
flashbulb memory
nounC1
/ˈflæʃbʌlb ˈmem(ə)ri/A vivid, detailed, and long-lasting memory of a surprising, consequential, and emotionally arousing event.
flashcard
nounB1
/ˈflæʃkɑːd/A small card, typically with a word, fact, or image on it, used for testing memory and aiding learning through spaced repetition.

Showing 2661–2680 of 5868 words.