Cilium
WordNet
noun
(1) A hairlike projection from the surface of a cell; provides locomotion in free-swimming unicellular organisms
(2) Any of the short curved hairs that grow from the edges of the eyelids
WiktionaryText
Noun
- A hairlike organelle projecting from a eukaryotic cell (such as unicellular organism or one cell of a multicelled organism). These structures serve either for locomotion by moving or as sensors.