Entry 2 senses · 2 variants Webster, 1913 Nicotian /(nĭ*kō"shan)/ · Ni·co·tian · IPA n. a. 01 n. Tobacco. 1. Tobacco.[R.] 02 a. Pertaining to, or derived from, tobacco. 1. Pertaining to, or derived from, tobacco.[R.]