coccyx

coccyx

her tail (in theory) attached by ligaments to the margins of— when sitting, sharp like a pressure cooker is exerted acts sort of like a shock absorber to be fractured or dislocated small triangular bone centered and neat, threadbare at best

also called tailbone

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ETYMOLOGY: New Latin, from Greek

cuckoo, coccyx

(from its resemblance to a cuckoo's beak)