noun🔗Share경질탄A kind of mineral coal of a black colour, sufficiently hard and solid to be cut and polished, and formerly burned as a substitute for candles."In the old house, we found a box filled with cannel coal, which the previous owners used for light before electricity became common. "오래된 집에서 우리는 이전 소유주들이 전기가 보편화되기 전에 빛을 위해 사용했던 경질탄이 가득 찬 상자를 발견했습니다.geologymaterialsubstancefuelChat with AIVocabulary GamePractice Reading
