Medical Dictionary

coccyx

noun coc·cyx \ˈkäk-siks\
plural coc·cy·ges \ˈkäk-sə-ˌjēz\ also coc·cyx·es \ˈkäk-sik-səz\

Medical Definition of COCCYX

:  a small bone that articulates with the sacrum and that usually consists of four fused vertebrae which form the terminus of the spinal column

Illustration of COCCYX

Browse

How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears