| 单词 | ion |
| 释义 | ion n. an atom or group of atoms that has lost one or more electrons (= CATION), or gained one or more electrons (= ANION). Phrases and idioms ion exchange the exchange of ions of the same charge between a usu. aqueous solution and a solid, used in water-softening etc. ion exchanger a substance or equipment for this process. Etymology: Gk, neut. pres. part. of eimi go |
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