English Words Starting With C

• cyclic amp

  nounC2
  /ˌsɪklɪk ˌeɪ ˌem ˈpiː/A crucial intracellular signaling molecule (adenosine monophosphate with a cyclic structure) that acts as a second messenger in many biological processes.
• cyclic gmp

  nounC1
  /ˈsʌɪklɪk ˌdʒiː em ˈpiː/An intracellular secondary messenger molecule (cyclic guanosine monophosphate) involved in cellular signal transduction.
• cyclic pitch lever

  nounVery low frequency (specialist)
  /ˈsɪklɪk pɪtʃ ˈliːvə/The flight control in a helicopter that tilts the main rotor disc to control the direction of horizontal flight (forward, backward, left, right).
• cyclic shift

  nounLow
  /ˈsʌɪklɪk ʃɪft/A transformation of a sequence where the elements are moved a fixed number of positions, with elements pushed off one end reappearing at the opposite end.
• cyclical

  adjectivenounC1
  /ˈsɪklɪk(ə)l/Happening in cycles; characterized by or occurring in regular, repeating patterns or intervals.
• cyclical unemployment

  nounC1
  /ˌsɪklɪkəl ˌʌnɪmˈplɔɪmənt/The component of overall unemployment that rises during economic recessions and falls during periods of economic growth, directly caused by the business cycle.
• cyclin

  nounVery Low
  /ˈsaɪklɪn/A type of protein that regulates the progression of cells through the cell cycle by activating cyclin-dependent kinases (CDKs).
• cyclin-dependent kinase

  nounC2 (Proficiency)
  /ˈsaɪ.klɪn dɪˌpen.dənt ˈkaɪ.neɪz/A type of enzyme crucial for controlling the progression of the cell cycle; it requires a partner protein called a cyclin to become active.
• cycling

  nounB1 (Intermediate)
  /ˈsaɪ.klɪŋ/The activity, sport, or mode of transport of riding a bicycle.
• cycling shorts

  plural-nounB2
  /ˈsaɪklɪŋ ʃɔːts/Tight-fitting, elasticated shorts worn for cycling, designed to reduce chafing and increase comfort.
• cyclist

  nounB1
  /ˈsaɪ.klɪst/A person who rides a bicycle, especially as a sport or for regular transport.
• cyclization

  nounLow
  /ˌsaɪklɪˈzeɪʃən/The chemical process of forming a ring structure from a linear molecule.
• cyclize

  verb-intransitiveverb-transitiveC2 (Very Low Frequency)
  /ˈsʌɪk(ə)lʌɪz/To undergo or cause to undergo a chemical reaction that forms a ring of atoms in a molecule.
• cyclizine

  nounLow
  /ˈsʌɪklɪziːn/A drug used primarily to prevent and treat nausea and vomiting, especially that associated with motion sickness or vertigo.
• cyclo-

  combining-formnounC1
  /ˈsaɪ.kləʊ/A prefix meaning 'circle,' 'cycle,' or 'wheel.'
• cyclo-cross

  nounLow (C2)
  /ˈsʌɪklə(ʊ)ˌkrɒs/A form of bicycle racing held on a mixed-terrain circuit combining paved and unpaved surfaces, featuring obstacles that often require riders to dismount and carry their bikes.
• cycloaddition

  nounRare/Very Specialised
  /ˌsaɪkləʊəˈdɪʃ(ə)n/A chemical reaction where two or more unsaturated molecules combine to form a cyclic compound.
• cycloaliphatic

  nounC2 / Very Low
  /ˌsaɪkləʊˌælɪˈfætɪk/Relating to or being an organic compound whose carbon atoms form a ring, but which is not aromatic.
• cycloalkane

  nounRare / Technical
  /ˌsʌɪkləʊˈælkeɪn/A saturated cyclic hydrocarbon with the general formula C_nH_2n.
• cyclodiene

  nounVery Low
  /ˌsaɪkləʊˈdaɪiːn/A specific class of synthetic chemical compounds belonging to the organochlorine insecticides.

Showing 13501–13520 of 13732 words.