any of a genus (Nicotiana) of New World plants of the nightshade family, including tobacco and several species with fragrant flowers, grown as ornamentals
See nicotiana in American Heritage Dictionary 4
(nĭ-kōˌshē-ănˈə, -äˈnə, -āˈnə)
noun
Any of various flowering annual or perennial herbs of the genus Nicotiana, native to the Americas and including the tobacco plant and ornamental species with fragrant flowers.