- A small triangular bone at the base of the spinal column in human beings and tailless apes, consisting of several fused rudimentary vertebrae. Also called tailbone 尾骨：人类与无尾猿的椎骨柱底部的小三角形骨，包括几个退化的融合椎骨 也作 tailbone
- New Latin 新拉丁语
- from Greek kokkux [cuckoo, coccyx (from its resemblance to a cuckoo's beak)] 源自 希腊语 kokkux [杜鹃，尾骨（从它与杜鹃的嘴相似而来）]