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English Words Starting With C

13,732 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)

chlorcyclizine
nounVery Low
/klɔːˈsaɪklɪziːn/An antihistamine drug of the piperazine class, primarily used to treat allergy symptoms and as an antiemetic.
chlordane
nounLow
/ˈklɔːdeɪn/A highly toxic, persistent synthetic chlorinated hydrocarbon formerly used as an insecticide.
chlordecone
nounLow (Specialist Term)
/ˈklɔːdɪkəʊn/A synthetic chlorinated organic compound used historically as an insecticide.
chlordiazepoxide
nounC2
/ˌklɔːdʌɪəzɪˈpɒksʌɪd/A benzodiazepine drug primarily used to treat anxiety and alcohol withdrawal, and as a sedative.
chlorella
nounLow
/klɔːˈrɛlə/A type of single-celled, green freshwater microalgae.
chlorenchyma
nounC2
/klɒˈrɛŋkɪmə/Plant tissue containing chloroplasts, specialized for photosynthesis.
chlorhexidine
nounLow
/ˌklɔːˈhɛksɪdiːn/A broad-spectrum antiseptic and disinfectant chemical compound.
chloric acid
nounLow
/ˌklɔːrɪk ˈæsɪd/A strong, unstable acid with the chemical formula HClO₃, containing chlorine in the +5 oxidation state.
chloride
nounC1
/ˈklɔːrʌɪd/A chemical compound containing chlorine, especially one that is binary (consisting of chlorine and another element).
chloride of lime
nounLow / Obsolete / Historical
/ˈklɔːraɪd əv laɪm/A white powder composed of calcium hypochlorite and calcium chloride, used historically as a bleaching agent and disinfectant.
chloride paper
nounC1/C2
/ˈklɔːrʌɪd ˈpeɪpə/A photographic printing paper coated with a light-sensitive emulsion containing silver chloride, producing prints with a distinctive warm-toned, matte finish, primarily used for contact printing.
chloridize
verb-transitiveVery Low / Technical
/ˈklɔːrɪdaɪz/to treat or combine with chlorine; to convert into a chloride.
chlorinate
verbverb-transitiveB2
/ˈklɔːrɪneɪt/To treat or sterilize something (especially water or a swimming pool) by adding chlorine.
chlorinated lime
nounC1
/ˈklɔːrɪneɪtɪd laɪm/A white powder consisting of calcium hypochlorite (Ca(ClO)₂), used as a bleaching agent, disinfectant, and deodorizer.
chlorine
nounB2
/ˈklɔːriːn/A chemical element (symbol Cl) with atomic number 17, a highly reactive, toxic, greenish-yellow gas of the halogen group.
chlorine 36
nounC2
/ˈklɔːriːn ˈθɜːti sɪks/A radioactive isotope of the element chlorine, with an atomic mass of 36.
chlorine dioxide
nounLow
/ˈklɔːriːn daɪˈɒksaɪd/A chemical compound with the formula ClO₂, used as a disinfectant and bleaching agent.
chlorinity
nounC2
/klɔːˈrɪnɪti/The concentration of chloride ions in water, especially seawater, usually measured in grams per kilogram of seawater (g/kg).
chlorite
nounC1/C2
/ˈklɔːrʌɪt/A green mineral consisting of a hydrous silicate of aluminium, iron, and magnesium.
chlormerodrin
nounExtremely low / Obsolete technical
/klɔːˈmɛrədrɪn/A chemical compound historically used as a mercurial diuretic, primarily for treating fluid retention and edema, now largely obsolete due to its mercury content and associated toxicity risks.

Showing 5161–5180 of 13732 words.