GNU Collaborative International Dictionary of English

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1.       
   ‖Cilia , n. pl. Cilium, the sing., is rarely used. [L. cilium eyelid.]
   (Anat.) The eyelashes.
   1913 Webster
   (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
   (Bot.) Hairlike processes, commonly marginal and forming a fringe like the eyelash.
   1913 Webster
   (Zool.) Small, vibratory, swimming organs, somewhat resembling true cilia, as those of Ctenophora.
   1913 Webster