Meaning of ION in English



Pronunciation: ' ī - ə n, ' ī - ˌ än

Function: noun

Etymology: Greek, neuter of i ō n, present participle of ienai to go ― more at ISSUE

Date: circa 1834

1 : an atom or group of atoms that carries a positive or negative electric charge as a result of having lost or gained one or more electrons

2 : a charged subatomic particle (as a free electron)

Merriam Webster Collegiate English Dictionary.      Merriam Webster - Энциклопедический словарь английского языка.