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

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

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