• (n.) A change in the character of a cell wall, by which it becomes harder. It is supposed to be due to an incrustation of lignin.
Impregnation of cell walls with lignin.
Lig`ni·fi·ca'tion (lĭg`nĭ*fĭ*kā'shŭn) noun [ Confer French lignification . See Lignify .] (Botany) A change in the character of a cell wall, by which it becomes harder. It is supposed to be due to an incrustation of lignin.