瀝れき青せい炭たん

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Meanings

noun

bituminous coal

A type of coal with a high volatile content, used in industry and power generation. Technical term; in everyday contexts, simply 石炭 (coal) is more common.

瀝れき青せい炭たんは発はつ電でん所しょでよく使つかわれる。
Bituminous coal is often used in power plants.

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Kanji

瀝dropping
青blue, green
炭charcoal, coal
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.