Cos"ta (k?s"t?), n. [L., rib. See Coast.]

1. Anat.

A rib of an animal or a human being.

2. Bot.

A rib or vein of a leaf, especially the midrib.

3. Zool. (a)

The anterior rib in the wing of an insect.


One of the riblike longitudinal ridges on the exterior of many corals.


© Webster 1913.