The Collaborative International Dictionary of English v.0.48:

Gynaecophore \Gy*n[ae]"co*phore\ (j[i^]*n[=e]"k[-o]*f[=o]r), n.
   [Gr. gynaikei^on the women's apartments + fe`rein to bear.]
   (Zool.)
   A ventral canal or groove, in which the males of some
   di[oe]cious trematodes carry the female. See Illust. of
   H[ae]matozoa.
   [1913 Webster]