Medical Dictionary
Main Entry:
ser·ra·tus Pronunciation:
se-'rAt-&s Function:
noun Inflected Form:
plural ser·ra·ti /-'rA-"tI/ : any of three muscles of the thorax that have complex origins but arise chiefly from the ribs or vertebrae:
a : SERRATUS ANTERIOR b : SERRATUS POSTERIOR INFERIOR c : SERRATUS POSTERIOR SUPERIOR