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单词 mother coal
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mother coal
mother coal n. = fusain n. 2.
ΚΠ
1855 Philos. Trans. (Royal Soc.) 145 150 We have not hitherto found any tissue at all resembling that which occurs occasionally abundantly in bituminous coal, and is known as mineral charcoal and mother-coal.
1873 J. W. Dawson Story Earth & Man vi. 118 A dusty fibrous substance, like charcoal, called ‘mother-coal’ by miners.
1900 Western Mail 22 Mar. He would have discarded a piece of coal which was shown to him as being unmarketable, because a thin line of what was termed ‘mother coal’ ran through it.
1975 Publ. Amer. Dial. Soc. 1973 xlix. 43 Mother coal, a powdery charcoal substance found layered in the coal.
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