| 单词 | colcothar |
| 释义 | colcothar /kol"keuh theuhr/, n. Chem. the brownish-red oxide of iron produced by heating ferrous sulfate: used chiefly as a pigment in paints and theatrical rouge, and as a polishing agent. Also called jewelers' rouge. [1595-1605; < ML < OSp colcotar, SpAr qulqutar, perh. < Gk chálkanthos copper sulfate solution] |
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