lignin lignify • ligninsulphonate · · · Info · Definitions · Characters · · lignin · · Text Latin · · Script 6 · · Length 2 · · Syllables Definitions · · · (noun) a complex polymer; the chief constituent of wood other than carbohydrates; binds to cellulose fibers to harden and strengthen cell walls of plants. · · Noun Definition 1 Characters · · g latin small letter g U+0067 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E