lignite(redirected from Lignite coal)
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Related to Lignite coal: peat coal
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.
lig·nit′ic (-nĭt′ĭk) adj.
(Minerals) a brown carbonaceous sedimentary rock with woody texture that consists of accumulated layers of partially decomposed vegetation: used as a fuel. Fixed carbon content: 46–60 per cent; calorific value: 1.28 × 107 to 1.93 × 107 J/kg (5500 to 8300 Btu/lb). Also called: brown coal
a soft coal, usu. dark brown, often having a distinct woodlike texture, and intermediate in density and carbon content between peat and bituminous coal.
[1800–10; < Latin lign(um) wood + -ite1]
lig•nit′ic (-ˈnɪt ɪk) adj.
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|Noun||1.||lignite - intermediate between peat and bituminous coal|
coal - fossil fuel consisting of carbonized vegetable matter deposited in the Carboniferous period
humate - material that is high in humic acids
jet - a hard black form of lignite that takes a brilliant polish and is used in jewelry or ornamentation