Electrons - Definitions from Dictionary.com

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American Heritage Dictionary - Cite This Source - Share This

e·lec·tron Audio Help (ĭ-lěk'trŏn') Pronunciation Key
n. Abbr. e
A stable subatomic particle in the lepton family having a rest mass of 9.1066 × 10^-28 grams and a unit negative electric charge of approximately 1.602 × 10^-19 coulombs. See Table at subatomic particle.

[electr(ic) + -on¹.]

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Electrons

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The American Heritage Science Dictionary - Cite This Source - Share This

electron Audio Help (ĭ-lěk'trŏn') Pronunciation Key

A stable elementary particle in the lepton family having a mass at rest of 9.107 × 10^-28 grams and an electric charge of approximately -1.602 × 10^-19 coulombs. Electrons orbit about the positively charged nuclei of atoms in distinct orbitals of different energy levels, called shells. Electrons are the primary charge carriers in electric current. Compare positron. See also electromagnetism , elementary particle , ion. See Table at subatomic particle.
A positron or a negatron. See more at negatron.