Meaning of ELECTRON in English

noun Etymology: electr- + 2-on Date: 1891 an elementary particle consisting of a charge of negative electricity equal to about 1.602 × 10 -19 coulomb and having a mass when at rest of about 9.109 × 10 -31 kilogram or about 1/1836 that of a proton

Merriam Webster. Explanatory English dictionary Merriam Webster.      Толковый словарь английского языка Мерриам-Уэбстер.