lignitic,a.|lɪgˈnɪtɪk| [f. lignite + -ic.] Pertaining to, or of the nature of, lignite. 1843in W. Humble Dict.Geol. etc.1862Dana Man.Geol. iii. 507 A Lignitic formation.1884Manch.Exam. 20 Aug. 6/3 Large masses of peat, lignitic branches..and animal remains.