| 单词 | feather-alum |
| 释义 | > as lemmasfeather-alum feather-alum n. [compare German Federalaun (mid 16th cent.)] ferroso-aluminic sulphate or halotrichite.The name feather alum has been applied also to magnesia alum and alunogen. ΘΚΠ the world > the earth > minerals > types of mineral > sulphates > [noun] > alum > feather alum alum plumec1425 plume alum1600 feather-alum1693 plumose alum1732 alunogen1834 1693 T. Urquhart & P. A. Motteux tr. F. Rabelais 3rd Bk. Wks. lii. 425 Do not here instance in competition with this Sacred Herb the Feather Allum. 1863–72 H. Watts Dict. Chem. II. 617 Feather-alum, a name applied to native hydrated sulphate of aluminum..and to native iron-alum or halotrichite..both of which occur in delicate fibrous crystals or masses. < as lemmas |
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