'Dysgenesis' definitions:

Definition of 'dysgenesis'

(from WordNet)
noun
Infertility between hybrids

Definition of 'Dysgenesis'

From: GCIDE
  • Dysgenesis \Dys*gen"e*sis\, n. [Pref. dys- + genesis.] (Biol.) A condition of not generating or breeding freely; infertility; a form of homogenesis in which the hybrids are sterile among themselves, but are fertile with members of either parent race. [1913 Webster]