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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)

fluoridate
verbverb-transitiveC2
/ˈflɔːrɪdeɪt/To add fluoride (a chemical compound containing fluorine) to a public water supply for the purpose of preventing tooth decay.
fluoridation
nounC1
/ˌflʊər.aɪˈdeɪ.ʃən/The controlled addition of a fluoride compound (usually sodium fluoride, fluorosilicic acid, or sodium fluorosilicate) to a public water supply to prevent tooth decay.
fluoride
nounC1
/ˈflɔːraɪd/A chemical compound containing fluorine, often added to water or toothpaste to prevent tooth decay.
fluoridize
verb-transitiveLow (Technical/Professional)
/ˈflʊərɪdʌɪz/To treat or impregnate with a fluoride, especially to add fluoride to drinking water or toothpaste for dental health.
fluorimeter
nounC2
/flʊəˈrɪmɪtə/An instrument that measures the intensity or wavelength of fluorescence.
fluorinate
verbverb-transitiveC2
/ˈflʊərɪneɪt/To introduce fluorine into a compound.
fluorine
nounC2
/ˈflʊəriːn/A highly reactive, pale yellow-green, gaseous chemical element with atomic number 9.
fluorine dating
nounVery Low
/ˈflʊəriːn ˈdeɪtɪŋ/A relative dating method in archaeology and geology that measures the amount of fluorine absorbed by bones and teeth from surrounding groundwater to determine their age relative to other specimens from the same site.
fluorite
nounLow
/ˈflʊəraɪt/A mineral, calcium fluoride (CaF₂), often occurring in crystals of various colours, prized for its lustre.
fluorocarbon
nounC1
/ˌflʊərəʊˈkɑːbən/A compound containing fluorine and carbon atoms, typically highly stable and often used in refrigerants, propellants, and industrial applications.
fluorochemical
nounC2/Technical
/ˌflʊərəʊˈkɛmɪk(ə)l/A chemical compound containing fluorine, especially one synthesized for industrial use.
fluorochrome
nounC2
/ˈflʊərə(ʊ)krəʊm/a fluorescent chemical compound that can absorb light at one wavelength and emit it at a longer wavelength, used to stain or label biological specimens for observation under a microscope.
fluorography
nounC2
/flʊəˈrɒɡrəfi/A photographic technique for producing images of objects, particularly body parts, using X-rays that have passed through the object and been made visible by fluorescence on a screen.
fluorometer
nounC2
/ˌflʊəˈrɒm.ɪ.tə/A device used to measure the intensity, concentration, or properties of fluorescence in a sample by exposing it to a specific wavelength of light and detecting the emitted light.
fluorophore
nounLow
/ˈflʊərə(ʊ)fɔː/A chemical compound that can re-emit light upon light excitation; it fluoresces.
fluorophosphate
nounVery Low
/ˌflʊərəʊˈfɒsfeɪt/A chemical compound containing both fluorine and phosphate groups.
fluorophosphoric acid
nounC2
/ˌflʊərəʊfɒsˈfɒrɪk ˈæsɪd/An inorganic acid containing fluorine and phosphorus atoms.
fluoroplastic
nounC2 / Very Low Frequency
/ˌflʊərəʊˈplæstɪk/A type of plastic, especially a fluorocarbon polymer, that is highly resistant to chemicals, heat, and weathering, commonly used as a non-stick coating or in seals.
fluoroquinolone
nounLow
/ˌflʊərəʊˈkwɪnələʊn/A class of synthetic broad-spectrum antibacterial drugs.
fluoroscope
nounC2 (very low frequency, highly specialized)
/ˈflʊərəskəʊp/A device used for observing the internal structure of an opaque object (like the human body) by means of X-ray images projected onto a fluorescent screen.

Showing 3281–3300 of 5868 words.