• WordNet 3.6
    • n dysgenesis infertility between hybrids
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Webster's Revised Unabridged Dictionary
    • n Dysgenesis (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.
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Century Dictionary and Cyclopedia
    • n dysgenesis Difficulty in breeding; difficult generation; sterility; infecundity.
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Webster's Revised Unabridged Dictionary
Pref. dys-, + genesis,


In literature:

Associated Words: dysgenesis, dysgenesic, hybrid, hybridization, thremmatology.
"Putnam's Word Book" by Louis A. Flemming