noun
electron volt; electronvolt; eV
Unit of energy used in physics, equal to the energy gained by an electron moving through a potential difference of one volt.
この粒子のエネルギーは約5電子ボルトです。
The energy of this particle is about 5 electron volts.
Compound of 電子 (electron) and ボルト (volt), a direct calque of English 'electron volt'.