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1. Formerly, any granule in a muscle fiber.
2. Now, sometimes used synonymously with myomitochondrion.
[sarco- + G. soma, body]
A large specialized mitrochondrion found in striated muscle.
sarcosome(1) An obsolete term for a mitochondrion within muscle (myomitochondrion), a distinction of no structural or functional utility.
(2) A nonspecific term for any organelle within a myocyte.
sarcosome(săr′kō-sōm) [″ + soma, body]
Former term for mitochondria, particularly of muscle cells.