electron

Short definition from Wiktionary

Noun

1. 1
   The subatomic particle having a negative charge and orbiting the nucleus; the flow of electrons in a conductor constitutes electricity.
2. 2
   Alloys of magnesium and other metals, like aluminum or zinc, that were manufactured by the German company Chemische Fabrik Griesheim-Elektron⁽ᵈᵉ⁾.