noun ra·ci·a·tion \ˌrāshēˈāshən\

Definition of raciation



  1. :  differentiation of local infraspecific groups within a population through continued selection for ecologically useful variations under conditions of at least partial isolation — compare speciation

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Origin and Etymology of raciation

irregular (influenced by speciation) from 7race + -ation

Seen and Heard

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to criticize severely

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