serratus

ser·ra·tus

noun \se-ˈrāt-əs\

plural ser·ra·ti \-ˈrā-ˌtī\

Definition of SERRATUS

: 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