sternum
Concise Oxford English Dictionary © 2008 Oxford University Press:
sternum /ˈstəːnəm/
▶noun (pl. sternums or sterna /-nə/)
- 1 the breastbone.
- 2 Zoology a thickened ventral plate on each segment of the body of an arthropod.
– origin C17: mod. L., from Gk sternon ‘chest’.
'sternum' also found in these Oxford entries:

