sacrococcygeal muscle n.
An inconstant and poorly developed muscle on the dorsal and ventral surfaces of the sacrum and the coccyx.
| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |
| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |
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