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mesosternum |
1 definition found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Mesosternum \Mes`o*ster"num\, n. [Meso- + sternum.] 1. (Anat.) The middle portion, or body, of the sternum. 2. (Zo["o]l.) The ventral piece of the middle segment of the thorax in insects.