tail vertebrae

coc·cyg·e·al ver·te·brae [Co1-Co4]

[TA] the four terminal segments of the vertebral column, usually fused to form the coccyx. Synonym(s): vertebrae coccygeae [CoI-IV] [TA], tail vertebrae

tail vertebrae

Anatomy
Coccygeal vertebrae; vertebrae coccygeae [NA].
 
Zoology
The tail vertebrae of lower animals.