By extension, sometimes employed as a synonym of anthracite, or of one of its varieties, the slaty glance coal. Also in plural culms, like coals.
| 单词 | θ6578 |
| 释义 | the world > the earth > minerals > types of mineral > hydrocarbon minerals > [noun] > coal > anthracite (7) culm1742 By extension, sometimes employed as a synonym of anthracite, or of one of its varieties, the slaty glance coal. Also in plural culms, like coals. rock coal1750 a hard form of coal; anthracite. anthracite1797 Coal of a hard, dense, non-bituminous variety that consists of relatively pure carbon and burns with little flame and smoke; (as a count noun) an… blind-coal1802 Non-bituminous coal, or anthracite, which burns without flame. glance-coal1805 a variety of anthracite (German glanzkohle, Dutch glanskool). Kilkenny coal1861 an Irish name for anthracite. Subcategories:— anthracitic condition (1) |
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