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musculus sacrococcygeus dorsalis --> dorsal sacrococcygeus muscle

(Science: anatomy) An inconstant and poorly developed muscle on the dorsal surfaces of the sacrum and coccyx, the remains of a portion of the tail musculature of lower animals.

Synonym: musculus sacrococcygeus dorsalis, dorsal sacrococcygeal muscle, musculus extensor coccygis, musculus sacrococcygeus posterior.