铵根 ǎngēn ammonium ion Origin Definitions Defs Strokes Stroke Words Sentences Sents 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.根 gēn radical (chemistry) (chemistry) a group of atoms that behave as a single unit; a radical