What is "mesorchium"

Mesorchium \Me*sor"chi*um\, n. [NL., fr. Gr. me`sos middle + ? a testicle.] (Anat.) The fold of peritoneum which attaches the testis to the dorsal wall of the body cavity or scrotal sac.

n. (context anatomy English) The fold of peritoneum that attaches the testis to the dorsal wall of the body cavity or scrotal sac.

The testes, at an early period of fetal life, are placed at the back part of the abdominal cavity, behind the peritoneum, and each is attached by a peritoneal fold, the mesorchium, to the mesonephros.