(a.) Between the ribs; pertaining to, or produced by, the parts between the ribs; as, intercostal respiration, in which the chest is alternately enlarged and contracted by the intercostal muscles.

adductor arm buccinator elbow forearm gemellus gluteus maximus infraspinatus intercostal latissimus dorsi levator masseter mentalis mylohyoid nasalis oblique occipitalis omohyoid pectineus pectoralis peroneus sphincter tensor trapezius triceps upper arm wrist