perimysial

from The Century Dictionary.

• Investing a muscle, as a sheath of connective tissue or a fascia; of or pertaining to perimysium.

from the GNU version of the Collaborative International Dictionary of English.

• adjective Surrounding a muscle or muscles.
• adjective Of or pertaining to the perimysium.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective Surrounding a muscle or muscles. Often used to characterize patterns of inflammation found in myopathic disease. Endomysial and perimysial patterns of inflammation are in contrast to perivascular inflammation which surrounds blood vessels.