| 单词 | mother of coal |
| 释义 | > as lemmasmother of coal mother of coal n. = fusain n. 2. ΚΠ 1867 W. W. Smyth Treat. Coal & Coal-mining 34 Soft mineral charcoal or ‘mother-of-coal’. 1877 Encycl. Brit. VI. 48/1 The last, which is known in England as ‘mother of coal’, resembles a soft, dull, black charcoal, containing abundant traces of vegetable fibre. 1958 Jrnl. Ecol. 46 447 Such fragments are often abundant and were once called..‘mother of coal’, but Stopes introduced the French word ‘fusain’ in her work on coal petrology. < as lemmas |
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