perimysium [per-uh-miz-ee-uh m, -mizh-] Word Origin noun, plural per·i·my·si·a [per-uh-miz-ee-uh, -mizh-] /ˌpɛr əˈmɪz i ə, -ˈmɪʒ-/. Anatomy.

  1. the connective tissue surrounding bundles of skeletal muscle fibers.

Origin of perimysium 1835–45; irregular from peri- + Greek mŷs mouse, muscle (cf. myo-) + -ium Related formsper·i·my·si·al, adjective British Dictionary definitions for perimysium perimysium noun plural -ia (-ɪə)

  1. anatomy the sheath of fibrous connective tissue surrounding the primary bundles of muscle fibres

Word Origin for perimysium C19: from peri- + -mysium, from Greek mus muscle perimysium in Medicine perimysium [pĕr′ə-mĭzh′ē-əm, -mĭz′ē-əm] n. pl. per•i•my•si•a (-ē-ə)

  1. The fibrous sheath enveloping each of the primary bundles of skeletal muscle fibers.

Related formsper′i•my′si•al adj.

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