Definition of ion

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  • ion is a valid Scrabble US word with a point value of 3
  • ion is a valid Scrabble UK word with a point value of 3
  • ion is a valid Words with friends word with a point value of 4

Definition of ion

  • a particle that is electrically charged (positive or negative); an atom or molecule or group that has lost or gained one or more electrons (noun)

See definition of ion in Merriam Webster