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English definition of “cilium”

cilium

noun [C]     /ˈsɪl.i.əm/ (plural cilia   //   ) specialized
one of the very small parts like hairs on the surface of a cell that move regularly and keep the surrounding liquid moving around it or help an organism with only one cell to move Cells
(Definition of cilium noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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