Costal

Costal may refer to:


 * an adjective related to the rib (costa) in anatomy
 * Costal cartilage, a type of cartilage forming bars which serve to prolong the ribs forward
 * Costal margin, the medial margin formed by the false ribs
 * Costal surface (disambiguation)
 * Costal groove, a groove between the ridge of the internal surface of the rib
 * Costal vein, a type of insect wing segment in the Comstock–Needham system