[cil.i.um] n, pl cil.ia [NL, fr. L, eyelid; akin to L celare to conceal--more at hell] (1794) 1: a minute short hairlike process often forming part of a fringe; esp: one on a cell that is capable of lashing movement and serves esp. in free unicellular organisms to produce locomotion or in higher forms a current of fluid
2: eyelash