inferior constrictor n a muscle of the pharynx that is the thickest of its three constrictors, arises from the surface and side of the cricoid and thyroid cartilages, inserts into the median line at the back of the pharynx, and acts to constrict part of the pharynx in swallowing called also constrictor pharyngis inferior, inferior pharyngeal constrictor muscle compare MIDDLE CONSTRICTOR, SUPERIOR CONSTRICTOR
Medical dictionary. 2011.