Medical Definition of cilium
plural cil·ia \-ē-ə\play
2: a minute short hairlike process often forming part of a fringe; especially : one of a cell that is capable of lashing movement and serves especially in free unicellular organisms to produce locomotion or in higher forms a current of fluid
Seen and Heard
What made you want to look up cilium? Please tell us where you read or heard it (including the quote, if possible).