The Collaborative International Dictionary
Urosacral
Urosacral \U`ro*sa"cral\, a. [2d uro- + sacral.] (Anat.) Of or pertaining to both the caudal and sacral parts of the vertebral column; as, the urosacral vertebr[ae] of birds.
Wiktionary
urosacral
a. (context anatomy English) Of or pertaining to both caudal and sacral parts of the vertebral column.