[elec.tron] n [electr- +
[2]-on] (1891): an elementary particle consisting of a charge of negative electricity equal to about 1.602E-19 coulomb and having a mass when at rest of about 9.109534E-28 gram or about 1/1836 that of a proton
[elec.tron] n [electr- +
[2]-on] (1891): an elementary particle consisting of a charge of negative electricity equal to about 1.602E-19 coulomb and having a mass when at rest of about 9.109534E-28 gram or about 1/1836 that of a proton
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012