Home › Words › M › monoionmonoionmonoion means any ion that has a single (positive or negative) charge.EtymologyFrom mono- + ion.nounAny ion that has a single (positive or negative) chargeDefinitions & examples from Wiktionary (CC BY-SA 3.0).Words closest in meaningBy meaning, not spelling — each word's AI semantic fingerprint, nearest first.monoanion 77% match — Any anion carrying a single negative charge. vs monoion →diion 74% match — Any ion having two electrical charges vs monoion →monoprotonated 66% match — protonated with a single proton (hydrogen ion) vs monoion →counterion 65% match — Any ion of opposite charge to another in a solution or other electrochemical system vs monoion →monocation 65% match — A cation formed by removal of a single electron from a neutral species vs monoion →coion 65% match — Any ion of the same charge as another in a solution or other electrochemical system. vs monoion →macroion 65% match — A very large ion, especially a colloidal particle carrying an electric charge vs monoion →isoionic 65% match — Having the same number of positive and negative charges vs monoion →