'Cilium' definitions:

Definition of 'cilium'

From: WordNet
noun
A hairlike projection from the surface of a cell; provides locomotion in free-swimming unicellular organisms
noun
Any of the short curved hairs that grow from the edges of the eyelids [syn: eyelash, lash, cilium]

Definition of 'Cilium'

From: GCIDE
  • Cilium \Cil"i*um\, n. [L., eyelid.] See Cilia. [1913 Webster]

Definition of 'Cilium'

From: GCIDE
  • Cilia \Cil"i*a\, n. pl. Cilium, the sing., is rarely used. [L. cilium eyelid.]
  • 1. (Anat.) The eyelashes. [1913 Webster]
  • 2. (Biol.) Small, generally microscopic, vibrating appendages lining certain organs, as the air passages of the higher animals, and in the lower animals often covering also the whole or a part of the exterior. They are also found on some vegetable organisms. In the Infusoria, and many larval forms, they are locomotive organs. [1913 Webster]
  • 3. (Bot.) Hairlike processes, commonly marginal and forming a fringe like the eyelash. [1913 Webster]
  • 4. (Zool.) Small, vibratory, swimming organs, somewhat resembling true cilia, as those of Ctenophora. [1913 Webster]