Note: Recent authors have distinguished four forms of this substance, naming them lignose, lignin, lignone, and lignireose.
LIGNIPERDOUS
Lig`ni*per"dous, a. Etym: [L. lignum wood + perdere to destroy: cf.
F. ligniperde.] (Zoöl.)
Defn: Wood-destroying; — said of certain insects.
LIGNIREOSE
Lig*nir"e*ose`, n. (Bot.)
Defn: See Lignin.
LIGNITE
Lig"nite, n. Etym: [L. lignum wood: cf. F. lignite.] (Min.)
Defn: Mineral coal retaining the texture of the wood from which it was formed, and burning with an empyreumatic odor. It is of more recent origin than the anthracite and bituminous coal of the proper coal series. Called also brown coal, wood coal.
LIGNITIC
Lig*nit"ic, a.
Defn: Containing lignite; resembling, or of the nature of, lignite; as, lignitic clay. Lignitic group. See Laramie group.
LIGNITIFEROUS
Lig`ni*tif"er*ous, a. Etym: [Lignite + -ferous.]