/ Dictionary / Index P perimysium: Meaning and Definition of Find definitions for: per•i•my•si•um Pronunciation: (per"u-miz'ē-um, -mizh'-), [key] — pl. -my•si•a the connective tissue surrounding bundles of skeletal muscle fibers. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: perimysium (Thesaurus) perimorph perinatal Related Content Daily Word Quiz: morose Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language