Of or pertaining to the sternum, especially the breast-bone of vertebrates: as, the sternal end of the clavicle; the sternal keel of a bird's breast-bone; sternal articulation; a sternal segment.In Invertebrata, of or pertaining to a sternite; sternitic.Ventral; hemal; on the ventral surface or aspect, where the sternum is situated; on the same side with the sternum; in man, anterior; in other animals, inferior: opposed to dorsal, tergal, or neural.The hemapophysis of a rib, as distinguished from the pleurapophysis; that part of a bony jointed rib answering to the costal cartilage of a mammalian rib, reaching from the end of the pleurapophysis to the sternum or toward it, as distinguished from a vertebral rib, which is the pleurapophysis alone. See cuts under epipleura and interclavicle.