See cilium in American Heritage Dictionary 4
noun pl. cil·i·a (-ē-ə)
- A microscopic hairlike process extending from the surface of a cell or unicellular organism. Capable of rhythmical motion, it acts in unison with other such structures to bring about the movement of the cell or of the surrounding medium.
- An eyelash.
- Botany One of the hairs along the margin or edge of a structure, such as a leaf, usually forming a fringe.
Origin: Latin, eyelid; see kel-1 in Indo-European roots
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