[linguistics] In the field of linguistics, polygenesis is the view that human languages evolved as several lineages independent of one another. It is contrasted with monogenesis, which is the view that human languages all go back to a single common ancestor. Polygenesis is not to be confused with the wave theory, originally propounded by Jo...
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http://en.wikipedia.org/wiki/Polygenesis_(linguistics)

theory that humans derived from many separate origins
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http://phrontistery.info/p.html

• (n.) Alt. of Polygeny
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http://thinkexist.com/dictionary/meaning/polygenesis/

The theory that, if two similar stories, words, or images appear in two different geographic regions
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http://www.encyclo.co.uk/local/22385
Pol`y·gen'e·sis (-jĕn'e*sĭs),
Po*lyg'e*ny (po*lĭj'e*nȳ)
noun [
Poly- +
genesis , or root of Greek
gi`gnesqai to be born.]
(Biol.) The theory that living organisms originate in cells or embryos of different kinds, instead of coming from...
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http://www.encyclo.co.uk/webster/P/121

polygenesis Origin from more than one species, line of ancestors, or source. Related topics utilizing this poly- prefix: Polysemy and Polysemous and Polygamy Sections.
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http://www.wordinfo.info/words/index/info/view_unit/2804/6
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