The Collaborative International Dictionary of English v.0.48:

Hymenogeny \Hy`me*nog"e*ny\, n. [Gr. ? a membrane + root of ? to
   be born.]
   The production of artificial membranes by contact of two
   fluids, as albumin and fat, by which the globules of the
   latter are surrounded by a thin film of the former.
   [1913 Webster]