costa

noun

1. a riblike part of a plant or animal (such as a middle rib of a leaf or a thickened vein of an insect wing)

   noun.body

   Source: WordNet 3.0

2. any of the 12 pairs of curved arches of bone extending from the spine to or toward the sternum in humans (and similar bones in most vertebrates)

   noun.body

   Synonyms rib

   Source: WordNet 3.0

3. A rib of an animal or a human being.

   noun

   Source: webster1913