serratus posterior ser·ra·tus·posterior uncommon noun 1. skeletal muscle that draws the rib cage backward and downward Synonymsposterior serratus muscleserratus posteriormusculus serratus posterior Related words Word family serratus posterior inferiorserratus posterior superior Broader terms serratus Narrower terms serratus posterior inferiorserratus posterior superior WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
