|  | 
Definition of Synsacrum
1. Noun. (context: anatomy of birds) The bone composed of the sacrum and some lumbar or caudal vertebrae fused together. ¹
¹ Source: wiktionary.com
|  | 
1. Noun. (context: anatomy of birds) The bone composed of the sacrum and some lumbar or caudal vertebrae fused together. ¹
¹ Source: wiktionary.com