Costal

Cos″tal (k?s″tal), a. [Cf. F. costal. See Costa.]

1. (Anat.) Pertaining to the ribs or the sides of the body; as, costal nerves.

2. (Bot. & Zoöl.) Relating to a costa, or rib.

Costal cartilage. See Cartilage, and Illust. of Thorax.