| 单词 | gum ammoniac |
| 释义 | gum ammoniac a brownish-yellow gum resin, having an acrid taste, occurring in tearlike fragments from a plant, Dorema ammoniacum, of western Asia: used in porcelain ceramics and in medicine as an expectorant and counterirritant. Also called ammoniac, ammoniacum. [1350-1400; ME] |
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