n 1 a  cap  :  a genus of annual herbs (family Moraceae) that have leaves with three to seven elongate leaflets and pistillate flowers in spikes along the leafy erect stems and that include the hemp (C. sativa)  b  :  HEMP 1  2  :  any of the preparations (as marijuana or hashish) or chemicals (as THC) that are derived from the hemp and are psychoactive .
 
 
 
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