caudal vertebra; tail vertebra
Anatomical term for the vertebrae of the tail, used in medical, zoological, and biological contexts.
In humans, the caudal vertebrae have degenerated to form the coccyx.
This fossil preserves a complete set of caudal vertebrae.
Compound of 尾 (tail) and 椎 (vertebra). The reading びつい follows standard on'yomi.