epimysium
noun
epi·my·si·um ˌe-pə-ˈmi-zhē-əm 
-zē-
plural epimysia ˌe-pə-ˈmi-zhē-ə
-zē-
: the external connective-tissue sheath of a muscle
Word History
Etymology
New Latin, irregular from epi- + Greek mys mouse, muscle — more at mouse entry 1
First Known Use
1900, in the meaning defined above
Medical Definition
epimysium
noun
epi·my·si·um ˌep-ə-ˈmiz(h)-ē-əm
plural epimysia -ē-ə
: the external connective-tissue sheath of a muscle compare endomysium