English Words Starting With C

• cy pres

  nounprepositionVery Low
  /siː ˈpreɪ/a doctrine in law (especially trust and estate law) allowing a court to modify the original terms of a charitable gift or trust as closely as possible to the donor's intent when literal fulfillment becomes impossible, impracticable, or illegal.
• cyan

  adjectivenounB2
  /ˈsaɪ.æn/A greenish-blue colour; one of the primary colours in the subtractive (CMYK) colour model, opposite to red.
• cyan blue

  nounMedium
  /ˌsaɪ.ən ˈbluː/A greenish-blue colour between blue and green on the visible spectrum; one of the primary subtractive colours (CMY).
• cyanamide

  nounVery Rare
  /ˌsaɪəˈnæmaɪd/A chemical compound, H₂NCN, or its metallic salts, used in fertilisers and as an intermediate in industrial synthesis.
• cyanate

  nounC2
  /ˈsaɪəneɪt/A salt or ester of cyanic acid.
• cyanic acid

  nounLow
  /saɪˌæn.ɪk ˈæs.ɪd/A toxic, unstable chemical compound with the formula HOCN.
• cyanide

  nounverb-transitiveC1
  /ˈsaɪənaɪd/A highly toxic chemical compound containing a carbon atom triple-bonded to a nitrogen atom (CN⁻), often used in industrial processes and historically as a poison.
• cyanide process

  nounC2
  /ˈsaɪənaɪd ˈprəʊsɛs/An industrial method for extracting gold or silver from ore using a solution of sodium cyanide.
• cyanine

  nounLow
  /ˈsaɪəˌniːn/A synthetic dye of a blue colour, belonging to a class of compounds containing two heterocyclic radicals linked by a chain of conjugated double bonds.
• cyanite

  nounVery Low (Technical)
  /ˈsaɪənaɪt/A blue mineral, an aluminium silicate, often found in long, bladed crystals; synonymous with 'kyanite'.
• cyano group

  nounLow (Technical/Scientific)
  /ˌsaɪə.nəʊ ˈɡruːp/The functional group -C≡N, consisting of a carbon atom triple-bonded to a nitrogen atom, found in many chemical compounds, especially cyanides and nitriles.
• cyanoacrylate

  nounLow
  /ˌsaɪə.nəʊ.əˈkraɪ.leɪt/A fast-acting, strong-bonding adhesive that works by polymerising on contact with moisture.
• cyanobacteria

  plural-nounLow
  /ˌsaɪənəʊbækˈtɪərɪə/A phylum of bacteria that obtain energy through photosynthesis, producing oxygen; also called blue-green algae.
• cyanocobalamin

  nounLow
  /ˌsaɪənəʊkəʊˈbæləmɪn/The crystalline, bioactive form of vitamin B12, a nutrient essential for red blood cell formation and neurological function.
• cyanogen

  nounC2
  /saɪˈæn.ə.dʒən/A highly toxic, flammable gas with the chemical formula (CN)₂, appearing as a colourless gas with a pungent odour.
• cyanogen bromide

  nounVery Low
  /ˌsaɪ.ə.nəʊ.dʒən ˈbrəʊ.maɪd/A toxic, volatile chemical compound with the formula CNBr, used as a reagent in molecular biology for modifying proteins and nucleic acids.
• cyanogen chloride

  nounC2
  /ˌsaɪə.nəʊ.dʒən ˈklɔː.raɪd/A highly toxic, colourless, volatile chemical compound (CICN), used as a chemical weapon.
• cyanogenesis

  nounC2
  /ˌsaɪ.ən.əʊˈdʒɛn.ɪ.sɪs/The biological or chemical production of hydrogen cyanide.
• cyanoguanidine

  nounVery Low
  /ˌsaɪ.ə.nəʊˈɡwɑː.nɪ.diːn/A white, crystalline, nitrogen-rich organic compound with the formula C2H4N4, used in the synthesis of various chemicals.
• cyanohydrin

  nounLow
  /ˌsaɪənəʊˈhaɪdrɪn/A chemical compound formed by the addition of hydrogen cyanide to a carbonyl group (like a ketone or aldehyde).

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