1.
coccyx; tailbone
The small, triangular bone at the bottom of the spine, the vestigial remnant of the human tail. Used in medical contexts and when describing injuries from falling on the lower back.
Composed of 尾 (tail) and 骨 (bone). A medical/anatomical term. In everyday conversation, Japanese speakers are at least as likely to use the more colloquial 尻尾の骨 or simply お尻の骨 when describing a fall.
Common collocations
- 尾骨を打つ: to bruise/hit one's tailbone
- 尾骨を骨折する: to fracture one's tailbone
- 尾骨が痛い: one's tailbone hurts
- 尾骨の痛み: pain in the tailbone