Costal may refer to: an adjective related to the rib () 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 See also Costa (disambiguation) Costas (disambiguation) Coastal Intercostal (disambiguation)