hydronium(redirected from Oxidanium)
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the hydrated proton H3O+; it is the form in which the proton (hydrogen ion, H+) exists in aqueous solution, a combination of H+ and H2O.
the hydrated proton, H3O+, a form in which hydrogen ion exists in aqueous solutions; also, H3O+·H2O, H3O+·2H2O, etc.
Synonym(s): oxonium ion