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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)

focaccia
nounB2
/fəˈkætʃ.ə/A flat Italian oven-baked bread, typically seasoned with olive oil, salt, and herbs, and sometimes topped with ingredients like rosemary, olives, or tomatoes.
focal area
nounC1
/ˈfəʊ.kəl ˈeə.ri.ə/The specific, central region or point that is the primary object of attention, interest, activity, or study within a broader context.
focal infection
nounC2
/ˈfəʊk(ə)l ɪnˈfekʃ(ə)n/A localized bacterial infection that serves as a source from which bacteria can spread to other parts of the body via the bloodstream or lymphatic system.
focal length
nounC2
/ˈfəʊkl lɛŋ(k)θ/The distance between the optical centre of a lens (or mirror) and its focal point (the point where parallel rays of light converge). This measurement determines the lens's angle of view and magnification.
focal plane
nounLow-frequency / Technical
/ˈfəʊkl̩ pleɪn/The plane in an optical system where light rays from an object converge to form a sharp image.
focal point
nounC1
/ˈfəʊkl̩ pɔɪnt/The central or most important point of something, where attention, activity, or interest is concentrated.
focal ratio
nounLow (Technical)
/ˈfəʊkəl ˈreɪʃiəʊ/A mathematical expression (f-number) representing the ratio of a lens or mirror's focal length to its aperture diameter.
focal seizure
nounSpecialised
/ˈfəʊkəl ˈsiːʒə/A brief, abnormal surge of electrical activity that begins in one specific, localized area of the brain.
focal-plane shutter
nounC1-C2 / Specialist / Low-Frequency General Corpus
/ˌfəʊ.kəl ˈpleɪn ˌʃʌt.ər/A camera shutter located directly in front of the image sensor or film plane, consisting of two curtains that move across the frame to expose the sensor.
focalize
verbverb-ambitransitiveC2
/ˈfəʊkəlaɪz/To bring or concentrate something into a central point of focus.
foch
nounVery Low (Extremely Rare / Obsolete)
/fɒʃ/A rare or obsolete term; in modern contexts, it is most widely recognized as the anglicized spelling of Foch, a surname of French origin (as in Ferdinand Foch). It has no established meaning in standard modern English.
foci
nounC1
/ˈfəʊ.saɪ/The plural form of 'focus', meaning the central points of attention, activity, or interest; in mathematics and science, specific points related to curves, lenses, or ellipses.
focometer
nounVery rare/obsolete technical term
/fəʊˈkɒmɪtə/An optical instrument for measuring the focal length of a lens.
focsani
nounVery Low (outside Romanian contexts)
/ˈfɒkʃæn/A city in eastern Romania, serving as the capital of Vrancea County.
focus
nounverbverb-intransitive+1B2
/ˈfəʊ.kəs/The central point of attention, activity, or interest; to direct attention or effort toward something specific.
focus group
nounC1
/ˈfəʊkəs ɡruːp/A small, demographically diverse group of people whose reactions to a product, concept, or service are studied in a guided discussion, typically for market research.
focus puller
nounLow (technical term)
/ˈfəʊkəs ˌpʊlə/A film crew member responsible for adjusting the focus of a camera lens during a shot to keep subjects sharp.
focused strategy
nounC1
/ˈfəʊ.kəst ˈstræt.ə.dʒi/A plan of action designed to concentrate resources and effort on a specific objective or narrow range of goals.
focusing cloth
nounRare
/ˈfəʊ.kə.sɪŋ ˌklɒθ/A piece of dark, opaque fabric used to cover the photographer's head and the back of a large-format or view camera to block out ambient light, allowing the photographer to clearly see the ground glass image for focusing.
fodder
nounverbverb-transitiveC1
/ˈfɒd.ər/Feed for livestock, such as dried hay, straw, or silage.

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