Definitions

1. noun

A bony structure in the pelvis that forms the posterior part of the pelvic girdle.

“In anatomy, the hypotarsus is a key component of the pelvis’s bony structure.”

2. anatomy term

Specifically, it refers to the posterior part of the ilium in birds and the posterior part of the ischium in other vertebrates.

“The bird’s pelvis had a well-developed hypotarsus that supported its powerful leg muscles.”