Meaning of ION in English

ION

[ 'ʌɪən ]

■ noun an atom or molecule with a net electric charge through loss or gain of electrons, either positive (a cat~ ) or negative (an an~ ).

Origin

C19: from Gk, neut. pres. participle of ienai 'go'.

Concise Oxford English vocab.      Сжатый оксфордский словарь английского языка.