硫酸铵 liúsuān'ǎn ammonium sulfate Origin Definitions Defs Strokes Stroke Words Sentences Sents 硫酸 liúsuān sulfate a salt or ester of sulfuric acid铵 銨 ǎn ammonium A positively charged ion derived from ammonia, also called 铵根 ǎngēn; it behaves similarly to metal ions in chemical compounds.