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English Words Starting With F

5,868 entries — pick a word to see its definition, pronunciation, and usage.

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

fractable
nounVery Rare / Obsolete
/ˈfraktəb(ə)l/Capable of being handled, managed, or negotiated with; tractable.
fractal
adjectivenounC1-C2
/ˈfræk.təl/A complex geometric shape or pattern that is self-similar at different scales, where small parts resemble the whole.
fraction
nounverbverb-ambitransitiveB1
/ˈfrækʃn/A numerical quantity that is not a whole number, expressed as one number divided by another (e.g., 1/2).
fractional crystallization
nounC2
/ˌfræk.ʃən.əl ˌkrɪs.tə.laɪˈzeɪ.ʃən/A laboratory or industrial separation process where a chemical mixture is purified by selectively crystallizing different components at different temperatures.
fractional currency
nounLow
/ˈfræk.ʃən.əl ˈkʌr.ən.si/Paper money or coinage issued in denominations of less than one standard monetary unit, typically for practical everyday transactions.
fractional distillation
nounC2
/ˌfræk.ʃən.əl ˌdɪs.tɪˈleɪ.ʃən/A laboratory and industrial process for separating components in a mixture of liquids based on their different boiling points, involving repeated cycles of vaporization and condensation.
fractional orbital bombardment system
nounC2
/ˌfræk.ʃən.əl ˈɔː.bɪt.əl bɒmˈbɑːd.mənt ˈsɪs.təm/A theoretical or actual weapon system where a warhead is placed in a low Earth orbit and can be de-orbited to strike a terrestrial target from any direction.
fractionalize
verb-ambitransitiveLow
/ˈfræk.ʃən.ə.laɪz/to divide something into smaller, separate parts or fractions, often as a strategy to manage ownership, investment, or resources.
fractionate
verbverb-transitiveC2
/ˈfrakʃ(ə)neɪt/To separate a mixture into its component parts.
fractionating column
nounC2
/ˈfrækʃəneɪtɪŋ ˈkɒləm/A vertical industrial apparatus used in chemical engineering and refining processes to separate a mixture of liquids into its individual components (fractions) based on their different boiling points.
fractionation
nounC2
/ˌfræk.ʃənˈeɪ.ʃən/The process or result of separating something into smaller constituent parts or fractions.
fractionator
nounVery Low
/ˈfræk.ʃən.eɪ.tə(r)/A device or apparatus, typically a distillation column, designed to separate a mixture into its individual components or fractions based on differences in their boiling points or other properties.
fractionize
verbverb-ambitransitiveC1
/ˈfræk.ʃən.aɪz/To divide or break something into smaller parts or fractions.
fractocumulus
nounC2
/ˌfræktəʊˈkjuːmjʊləs/A low-lying, ragged cloud mass; broken or fragmentary cumulus.
fractostratus
nounVery Low
/ˌfraktəʊˈstrɑːtəs/A low-lying, fragmented layer of stratus cloud with a ragged, torn appearance.
fracture
nounverbverb-intransitive+1B2
/ˈfræk.tʃər/A break or crack in a hard object or material, especially a bone.
fracture zone
nounC2
/ˈfræk.tʃə ˌzəʊn/A linear region of the Earth's crust, especially on the ocean floor, characterized by fractures, faults, and offsets in geological features.
fraenulum
nounC2 / Very Rare / Technical
/ˈfrɛn.jʊ.ləm/A small fold or ridge of tissue that secures or restricts the motion of an organ or part in the body.
fraenum
nounRare
/ˈfriːnəm/A small fold of membrane or tissue that restricts the movement of an organ or part in the body.
frag
nounverbverb-transitiveLow to Medium
/fræɡ/A fragmentation grenade; a type of explosive weapon designed to produce high-velocity fragments upon detonation.

Showing 4521–4540 of 5868 words.