hydroncommon nounSyllable DecompositionhydronEtymologyexpandword see hydro- and -on.Definition1. Name of the mixture of cations 1H+ ('proton'), 2H+ ('deuteron') and 3H+ ('triton') in the natural proportions of hydrogen isotopes, also used when it is not necessary to distinguish the various isotopes.chimieexpandTranslationsenglish:hydron