The Collaborative International Dictionary
Polygenist
Polygenist \Po*lyg"e*nist\ (-n[i^]st), n. (Biol.) One who maintains that animals of the same species have sprung from more than one original pair; -- opposed to monogenist.
Wiktionary
polygenist
n. One who maintains that animals of the same species have sprung from more than one original pair; -- opposed to monogenist.