electron -
Alloys of magnesium and other metals, like aluminum or zinc, that were manufactured by the German company Chemische Fabrik Griesheim-Elektron.
Wikipedia
The electron is a subatomic particle carrying a negative electric charge. It has no known components or substructure. Therefore the electron is generally-believed to be an elementary particle.
OmegaWiki Dictionary
Ω
electron An elementary particle with a negative charge. Together with atomic nuclei, it makes up atoms.