tailbone
/ˈteɪlˌboʊn/
noun
- The small triangular bone at the bottom of the spine in humans, formed from fused vertebrae; the coccyx.
- The doctor explained that the tailbone is what remains of a tail from our evolutionary ancestors.
- She fell on the ice and bruised her tailbone, making it painful to sit.
- He felt a sharp pain in his tailbone after sitting on the hard bench for hours.
Synonyms