Definition of presternum in US English:

presternum

(also praesternum)

noun

  • 1A narrow sclerite present at the anterior end of the sternum of a segment in some insects.

  • 2Anatomy 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.

Pronunciation

presternum

/ˌpriːˈstəːnəm/