What is "mesocarp"

Mesocarp \Mes"o*carp\, n. [Meso- + Gr. karpo`s fruit.] (Bot.) The middle layer of a pericarp which consists of three distinct or dissimilar layers.
--Gray.

n. (context botany English) The middle layer of the pericarp of a fruit. In many fruits such as drupes and tomatoes, the mesocarp is fleshy.

n. the middle layer of a pericarp