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单词 gum ammoniac
释义

WordReference Random House Unabridged Dictionary of American English © 2024
gum ammoniac, 
  1. Chemistry, Drugs, Plant Biologya 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. 
  • Middle English 1350–1400

Collins Concise English Dictionary © HarperCollins Publishers::
gum ammoniac n
  1. another name for ammoniac
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