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A magnon is a collective excitation of the electrons' spin structure in a crystal lattice.
Magnon may also refer to:
- Magnon, Gabon, a village
- Jean Magnon (died 1662), French playwright
- Leonor Villegas de Magnon (1876–1955), political activist, teacher, and journalist
- Magnon, the 19th-century landowner in Les Eyzies, France, on whose land was discovered Cro-Magnon Man
- Magnon Solutions, an Indian company