n. [ NL., fr. Braz. petun tobacco. ] (Bot.) A genus of solanaceous herbs with funnel-form or salver-shaped corollas. Two species are common in cultivation, Petunia violacea, with reddish purple flowers, and Petunia nyctaginiflora, with white flowers. There are also many hybrid forms with variegated corollas. [ 1913 Webster ]