a large mitochondrion found in striated muscle fibres
sarcosome in American English
(ˈsɑːrkəˌsoum)
noun
Biology
a mitochondrion occurring in a muscle fiber
Word origin
[1895–1900; sarco- + -some3]This word is first recorded in the period 1895–1900. Other words that entered Englishat around the same time include: backwind, cutback, frame of reference, freewheel, slapstick-some is a combining form meaning “body,” used in the formation of compound words. Otherwords that use the affix -some include: episome, microsome, monosome, nucleosome, phagosome