Word of the Day: Electron

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- Electron -

pronounced [ih-lek-tron]

noun

1. Also called negatron. Physics, Chemistry . an elementary particle that is a fundamental constituent of matter, having a negative charge of 1.602 × 10 ⁻¹⁹ coulombs, a mass of 9.108 × 10 ⁻³¹ kilograms, and spin of ¹ / ₂ , and existing independently or as the component outside the nucleus of an atom.

2. Electricity . a unit of charge equal to the charge on one electron.

Origin:
coined 1891, from electric

http://dictionary.reference.com/browse/electron

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