Source : Webster's Revised Unabridged Dictionary (1913)

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.