Informal Name for the Coccyx
This page is the CodyCross answer for the clue below from Welcome to Japan, Group 561, Puzzle 4 (Golden Pavilion).
Question
Informal Name for the Coccyx
Answer
TAILBONE
Word Meaning:
TAILBONE — (informal) The final fused vertebrae at the base of the spine; the coccyx.
Definitions from Wiktionary.