A hard, opaque, combustible black or blackish mineral, consisting mainly of carbon, which occurs in seams or strata at or below the earth's…
| 单词 | θ6573 |
| 释义 | the world > the earth > minerals > types of mineral > hydrocarbon minerals > [noun] > coal (60) coal1253 A hard, opaque, combustible black or blackish mineral, consisting mainly of carbon, which occurs in seams or strata at or below the earth's… main coal1708 (a) a main or principal seam of coal; (b) coal extracted from a main seam, of recognized good quality. black diamond1803 figurative. Chiefly in plural. A piece of coal, spec. anthracite. Subcategories:— as distinguished from charcoal (5) — constituents of (4) — degree of hardness (1) — coal in seams or benches (2) — anthracite (7) — lignite (13) — hard coal (4) — splintery coal (2) — cannel coal (7) — other types of coal (10) — coaly fire-clay (1) — fragment (1) |
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