'Mesosternum' definitions:

Definition of 'Mesosternum'

From: GCIDE

Mesosternum \Mes`o*ster"num\, n. [Meso- + sternum.] [1913 Webster]
1. (Anat.) The middle portion, or body, of the sternum. [1913 Webster]
2. (Zool.) The ventral piece of the middle segment of the thorax in insects. [1913 Webster]