omosternum
/əʊməʊˈstəːnəm/Zoology
noun
A bone forming part of the cranial end of the sternum in some vertebrates; specifically a short column of bone located between the episternum and the united precoracoids in certain amphibians.
Origin
Mid 19th century; earliest use found in William K. Parker (1823–1890), comparative anatomist and zoologist. From omo- + sternum.