ion
n. countablen. a tiny particle that has an electrical charge because it has gained or lost electrons.
n. an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.
Salt dissolves in water to form sodium and chloride ions.
The battery works by moving lithium ions between the positive and negative electrodes during the charging cycle.
In the upper atmosphere, solar radiation strips electrons from gas molecules, creating a layer of ions that can reflect radio waves back to Earth.
From the ending of anion and cation, which in turn is from Ancient Greek ἰόν (ión, “going”), neuter present participle of εἶμι (eîmi, “I go”). Coined by English polymath William Whewell in 1834 for Michael Faraday, who introduced it later that year.
From a reduction of I don't.
Commonly used in chemistry and physics; often modified by 'positive', 'negative', 'metal', or 'hydrogen'.