plural noun sing. cilium -·ium (-ē əm)

1. the eyelashes

2. Etymology: ModL

   Bot. small hairlike processes extending from certain plant cells and forming a fringe, as on the edges of some leaves
3. Zool. short, hairlike outgrowths of certain cells, usually capable of rhythmic beating that can produce locomotion and feeding currents, as in protozoans or small worms, or the movement of fluids, as in the ducts of higher forms

Etymology: L, pl. of cilium, eyelid; akin to celare: see conceal