sarcoplasm
noun
sar·co·plasm ˈsär-kə-ˌpla-zəm 
: the cytoplasm of a striated muscle fiber
sarcoplasmic
ˌsär-kə-ˈplaz-mik
adjective 
Word History
Etymology
borrowed from German Sarkoplasma, from sarko- sarco- + -plasma -plasm
First Known Use
1899, in the meaning defined above
Medical Definition
sarcoplasm
noun
sar·co·plasm ˈsär-kə-ˌplaz-əm
: the cytoplasm of a striated muscle fiber compare myoplasm