epoophoron

noun

ep·​ooph·​o·​ron ˌep-ō-ˈäf-ə-ˌrän, -ə-ˈwäf- 

: a rudimentary organ homologous with the male epididymis that lies in the broad ligament of the uterus and consists of a number of small tubules which are the remains of the tubules of the mesonephros of the embryo and which open into Gartner's duct

called also organ of Rosenmüller, parovarium