1. 
   Polygenist
   Po·lyg'e·nist (-nĭst) noun (Biol.) One who maintains that animals of the same species have sprung from more than one original pair; -- opposed to monogenist .
   Found op http://www.encyclo.co.uk/webster/P/121
   
   
2. 
   polygenist
   <biology> One who maintains that animals of the same species have sprung from more than one original pair; opposed to monogenist. ... Source: Websters Dictionary ... (01 Mar 1998) ...
   Found op http://www.mondofacto.com/facts/dictionary?polygenist
   
   
3. 
   Polygenist
   • (n.) One who maintains that animals of the same species have sprung from more than one original pair; -- opposed to monogenist.
   Found op http://thinkexist.com/dictionary/meaning/polygenist/
   
   

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