presternum
/ˌpriːˈstəːnəm/(also praesternum)
noun
1A narrow sclerite present at the anterior end of the sternum of a segment in some insects.
2 Anatomy and Zoology. The anterior or superior part of the sternum; the manubrium of the sternum.
Origin
Early 19th century (in an earlier sense). From pre- + sternum.