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3 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 cop·per·as /ˈkɑp(ə)rəs/
 綠礬

From: DICT.TW English-Chinese Medical Dictionary 英漢醫學字典

 cop·per·as /ˈkɑp(ə)rəs/ 名詞
 綠礬

From: Webster's Revised Unabridged Dictionary (1913)

 Cop·per·as n.  Green vitriol, or sulphate of iron; a green crystalline substance, of an astringent taste, used in making ink, in dyeing black, as a tonic in medicine, etc. It is made on a large scale by the oxidation of iron pyrites. Called also ferrous sulphate.
 Note:The term copperas was formerly synonymous with vitriol, and included the green, blue, and white vitriols, or the sulphates of iron, copper, and zinc.