Literally meaning: “around the muscle”
Origin: Anc Greek
περί-/peri- (=combining form meaning “around”)
+ μυς/mys/ (=muscle, mouse) > μύω/myo(=enclosed, like the muscle inside body or the rat in its nest=epimys)
+-um=latin suffix that forms singular nouns
Perimisium is connective tissue sheath which surrounds several muscle (beetwen 10 to 100 or more) fibers into sections (bundles).