costiferous

from The Century Dictionary.

• In anatomy, rib-bearing: applied to those vertebræ, as the dorsal vertebræ of man, which bear free articulated ribs, and to those parts or processes of the sternum of some animals, as birds, to which ribs are jointed.

from the GNU version of the Collaborative International Dictionary of English.

• adjective (Anat.) Rib-bearing, as the dorsal vertebræ.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective anatomy Bearing ribs.