/ Thesaurus / S Synonyms of serratus posterior inferior Find synonyms for: Noun1. serratus posterior inferior, posterior serratus muscle, serratus posterior, musculus serratus posteriorusage: a thin quadrilateral muscle at the junction of the thoracic and lumbar regions; acts to counteract the pull of the diaphragm on the ribs to which it is attachedWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: languid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language