hydronium(redirected from H+ Ion)
Also found in: Dictionary, Encyclopedia.
Related to H+ Ion: Hydroxonium
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