Medical Dictionary
Main Entry:
jaw Pronunciation:
'jo Function:
noun 1 : either of two complex cartilaginous or bony structures in most vertebrates that border themouth, support the soft parts enclosing it, and usually bear teeth on their oral margin:
a : an upper structure more or less firmly fused with the skull called also
upper jaw,maxilla b : a lower structure that consists of a single bone or of completely fused bones and that is hinged, movable, and articulated by a pair of condyles with the temporalbone of either side called also
inferior maxillary bone, lower jaw, mandible 2 : the parts constituting the walls of the mouth and serving to open and close it—usually used in plural
3 : any of various organs of invertebrates that perform the function of the vertebrate jaws