noun, noun which may take the genitive case particle 'no'
brown coal; lignite
Technical term for a low-grade coal; used in geology, energy, and industrial contexts.
Lignite has a low calorific value among coals.
Lignite mining is carried out in this region.
Standard kanji spelling for lignite/brown coal.
Compound of 褐 (brown) and 炭 (coal/charcoal). The exact historical derivation is uncertain, but the spelling is conventionally associated with the meaning 'brown coal'.