English Explanatory Dictionary

hydrogen ion

English dictionary entry

Meanings

noun
  1. Used other than figuratively or idiomatically: see hydrogen, ion.: H⁻ or H⁺
  2. a proton combined with one or more water molecules; usually written H₃O⁺ and called the hydronium ion though is best considered as H₉O₄⁺ but is often written H⁺_((aq)) for simplicity
  3. a bare hydrogen nucleus; a proton, deuteron or triton

Word forms

hydrogen ion hydrogen ions

Related words

hydronium hydroxide hydroxyl pOH pH
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