Category:Costa

Cos"ta (ks"t), n. Etym: [L., rib. See Coast.]

1. (Anat.)

Defn: A rib of an animal or a human being.

2. (Bot.)

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

3. (Zoöl.) (a) The anterior rib in the wing of an insect. (b) One of the riblike longitudinal ridges on the exterior of many corals.