coccyx

Meanings

1. 1
   noun

   The final (bottom-most) fused vertebrae at the base of the spine, the tailbone.

   He lands on the concrete path and bounces on his coccyx, which cracks the base of his spine.

2. 2
   noun

   the end of the vertebral column in humans and tailless apes

From Latin coccyx, from Ancient Greek κόκκυξ (kókkux, “cuckoo”), referring to the curved shape of a cuckoo's beak when viewed from the side.

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