| 单词 | alum stone |
| 释义 | > as lemmasalum stone alum stone n. [compare German Alaunstein (15th cent.)] now chiefly historical a rock or mineral from which alum is obtained, esp. alunite. ΘΚΠ the world > the earth > minerals > types of mineral > sulphates > [noun] > alunite alum stone1651 aluminilite1804 alunite1821 alumite1826 1651 S. Hartlib Legacie 87 Allum-stone is found in Anglesey, but especially at Gisborrow in Yorkeshire. 1728 J. Woodward Catal. Addit. Eng. Native Fossils 96 There is Alum-stone about 20 Foot underneath. 1833 C. Lyell Princ. Geol. III. 223 Hot sulphureous vapours, which convert the trachyte into alum-stone. 1841 R. C. Campbell tr. W. F. X. von Kobell Instructions Discrim. Minerals 36 Alum-stone..Alunite. 1921 T. Crook Econ. Mineral. 404 Aluminilite..has also been called alumstone, on account of its use in the manufacture of alum. 1999 Anthropos 94 426/2 Only wealthier households can afford to buy this pedra ume (alum stone). < as lemmas |
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