plainsman

from WordNet (r) 3.0 (2006)
plainsman
    n 1: an inhabitant of a plains region (especially the Great
         Plains of North America)
    
from The Collaborative International Dictionary of English v.0.48
Plainsman \Plains"man\, n.; pl. {-men}.
   One who lives in the plains.
   [1913 Webster]
    

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