| 单词 | stone-butter |
| 释义 | > as lemmasstone-butter stone-butter n. [after German Steinbutter ; compare rock butter n. at rock n.1 Compounds 2a(a).] a name for alum occurring in soft masses greasy to the touch. ΘΚΠ the world > the earth > minerals > types of mineral > sulphates > [noun] > alum > other alums spire-alumc1375 stone-butter1796 rock butter1804 manganese alum1842 tschermigite1868 tamarugite1890 1796 R. Kirwan Elements Mineral. (ed. 2) II. 14 [Alum] is found in soft brittle masses, that feel somewhat greasy, and thence called by the Germans Stone Butter. < as lemmas |
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