Cilia
The fine hairlike projections from certain cells such as those in the respiratory tract that sweep in unison and help to sweep away fluids and particles.
Some single-celled organisms use the rhythmical motion of cilia for locomotion.</P> Cilia is the plural of cilium, a Latin word referring to the edge of the eyelid and, much later, to the eyelashes.
In the same sense, cilia came to refer to the fine hairlike projections from cells.