Nicotiana

n. decorative flowering plant related to tobacco that bears aromatic white or purple or yellow flowers

Nicotiana refers to a genus of short-leafed plants of the nightshade family indigenous to North and South America. The leaves of various Nicotiana sp., also commonly referred to as tobacco plants, are cultivated and grown to produce tobacco. The plants contain high quantities of nicotine and as such are commonly used as entheogens and used for pleasure. The leaves processed into forms where they can be smoked, chewed, and sniffed.
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Noun
1. American and Asiatic aromatic herbs and shrubs with viscid foliage
(synonym) genus Nicotiana
(hypernym) asterid dicot genus
(member-holonym) Solanaceae, family Solanaceae, potato family
(member-meronym) tobacco

(n.)
A genus of American and Asiatic solanaceous herbs, with viscid foliage and funnel-shaped blossoms. Several species yield tobacco. See Tobacco.