| 单词 | red iron froth |
| 释义 | > as lemmasred iron froth red iron froth n. now rare a form of haematite occurring as red scales. ΚΠ 1805 R. Jameson Treat. External Characters Minerals 80 Scaly particles..occur in brown and red iron froth. 1851 Encycl. Americana VII. 65/2 Scaly red iron ore, or red iron froth, consisting of very small, scaly, lamellar particles. 1943 Thorpe's Dict. Appl. Chem. (ed. 4) VI. 161/1 Earthy, ochreous varieties [of haematite] are brighter red in colour, and are often mixed with clay; these are known as reddle, ruddle and red iron-froth. < as lemmas |
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