Any of a large group of fossil resins occurring in deposits of lignite, peat, etc., and (unlike Baltic amber) containing little or no succinic acid.
| 单词 | θ216909 |
| 释义 | society > occupation and work > materials > derived or manufactured material > processed resinous materials > [noun] > derived from brown coal (2) retinite1853 Any of a large group of fossil resins occurring in deposits of lignite, peat, etc., and (unlike Baltic amber) containing little or no succinic acid. melanchyme1868 A bituminous material, partly soluble in alcohol, found in some deposits of brown coal in Bohemia. |
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