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瀝青炭 (rekiseitan) Japanese meaning: bituminous coal | Kotomora
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Bituminous coal is often used in power plants.
Kanji 歴 curriculum, continuation, passage of time Related words 石せき 炭たん 石炭 is the general term for coal, while 瀝青炭 specifically refers to bituminous coal, a subtype.
無む 煙えん 炭たん 無煙炭 is anthracite, a harder, higher-grade coal with less volatile matter than bituminous coal.
Written forms 瀝れき 青せい 炭たん
Standard kanji spelling using 瀝青 (bitumen/pitch) + 炭 (coal).
歴れき 青せい 炭たん
Variant spelling using 歴 as a simplified substitute for 瀝; less common but recognized.
Etymology Compound of 瀝青 (bitumen, pitch) and 炭 (coal). The kanji 瀝 means 'drip' or 'trickle', referring to the pitch-like substance, while 青 (blue/green) is used here in the sense of 'pitch' or 'tar'. The variant 歴青炭 replaces 瀝 with the simpler 歴, likely for ease of writing.
