= plume alum n. at plume, n. compounds 2.
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| 单词 | θ7157 |
| 释义 | the world > the earth > minerals > types of mineral > sulphates > [noun] > alum > feather alum (5) alum plumec1425 = plume alum n. at plume, n. compounds 2. plume alum1600 a mineral consisting of a double sulphate of aluminium and iron, occurring as tufts of silky, fibrous crystals; = halotrichite, n. feather-alum1693 ferroso-aluminic sulphate or halotrichite. plumose alum1732 = plume alum n. at plume, n. compounds 2 (see also quot. 1678 at sense 1). alunogen1834 A mineral consisting of hydrated aluminium sulphate, typically occurring as masses of feathery or fibrous crystals. Cf. feather-alum n. at feather, n.… |
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