Medical Name for the Tailbone of the Spine

This page is the CodyCross answer for the clue below from Mesopotamia, Group 974, Puzzle 1 (Foundational Philosophy).

Question is: Medical Name for the Tailbone of the Spine

and the answer is: COCCYX

Word Meaning:

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

Definitions from Wiktionary.