cilium

/ˈsɪliəm/
noun
  1. A tiny hairlike structure on the surface of a cell that moves to help the cell move or to move fluids around it.
    • Each cilium beats in a coordinated wave to move particles along the cell surface.
    • Scientists study the movement of a single cilium to understand how cells clean themselves.
    • The cilia in your lungs help push mucus and germs out of your airways.
  2. An eyelash.
    • The doctor examined the cilium under a microscope to check for infection.
    • Each cilium on the eyelid helps protect the eye from dust.
    • She noticed a cilium had fallen onto her cheek and gently brushed it away.
Synonyms
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