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褐炭 (かったん) — brown coal; lignite
褐炭
brown coal
炭酸 たんさん
carbonic acid
炭素 たんそ
carbon (C)
炭 すみ
charcoal
後炭 「ごずみ」「のちすみ」
second adding of charcoal to the fire (in tea ceremony)
花炭 「はなずみ」「はなすみ」
flower charcoal (whereby a flower, seed, branch, or other item of flora is carbonized as is, retaining its form)