urostyle
/ˈjʊroʊˌstaɪl/
noun
- A rod-like bone at the end of the spinal column in frogs and toads, formed from fused tail vertebrae.
- In anatomy class, we examined the urostyle of a preserved frog skeleton.
- The urostyle is a key feature that distinguishes frogs from other amphibians.
- The frog's urostyle helps support its pelvis during jumping.