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cilium noun

  /ˈsɪl.i.əm/
  • (cytology) A short microscopic hairlike organelle projecting from a eukaryotic cell (such as a unicellular organism or one cell of a multicelled organism) which serve either for propulsion by causing currents in the surrounding fluid or as sensors.
 cil
  • (botany) One of the hairs or similar protrusions along the margin of an organ.
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