Webster's English Dictionary

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marihuana

mar.i.hua.na or mar.i.jua.na \.mar-*-'(h)wa:n-*\ n [MexSp mariguana, 
   marihuana] 1: a wild tobacco (Nicotiana glauca)  2a: HEMP  2b: the dried 
   leaves and flowering tops of the pistillate hemp plant that y ield cannabin 
   and are sometimes smoked in cigarettes for their intoxicating effect