A soft, brownish-black coal in which the alteration of vegetable matter has proceeded further than in peat but not as far as in bituminous coal. Also called brown coal.
A low-grade, brownish-black coal
Mineral coal maintaining the texture for the lumber where it absolutely was created, and burning up with an empyreumatic smell. Its of newer source than the anthracite and bituminous coal for the proper coal series. Called also brown coal, lumber coal.
Brown-coal; imperfectly formed coal, or that where the original as a type of the timber is so distinctly preserved that it could easily be recognized by the unaided attention.