cacogenesis

noun
caco·gen·e·sis | \ ˌkakəˈjenəsə̇s \

Definition of cacogenesis 

1 : inability to produce hybrids that are both viable and fertile

2 : racial deterioration especially when due to the retention of inferior breeding stock

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First Known Use of cacogenesis

1922, in the meaning defined at sense 2

History and Etymology for cacogenesis

New Latin, from cac- + genesis

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The first known use of cacogenesis was in 1922

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