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Definition of Sarcosome
1. Noun. A large mitochondrion in a striated muscle fiber.
Definition of Sarcosome
1. [n -S]
Medical Definition of Sarcosome
1. 1. Formerly, any granule in a muscle fibre. 2. Now, sometimes used synonymously with myomitochondrion. Origin: sarco-+ G. Soma, body (05 Mar 2000)