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Definition of Complex ion
1. Noun. (chemistry) any ion containing more than one atom. e.g. sulphate as opposed to sulphide ¹
2. Noun. (chemistry) any ion in which a central metal atom (normally a transition element) is surrounded by a group of ions or molecules (ligands). e.g. ferricyanide ¹
¹ Source: wiktionary.com
Medical Definition of Complex ion
1.
The colour, texture, and general appearance of the skin of the face.
Origin: L. Complexio, a combination, (later) physical condition
(05 Mar 2000)