cultivar

from WordNet (r) 3.0 (2006)
cultivar
    n 1: a variety of a plant developed from a natural species and
         maintained under cultivation
    
from The Collaborative International Dictionary of English v.0.48
cultivar \cultivar\ n.
   a variety of a plant developed from a natural species and
   maintained under cultivation.
   [WordNet 1.5]
    

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