Gelion may refer to:
*
Gelion (Middle-Earth): a fictional river in
Tolkien's legendarium
Tolkien's legendarium is the body of J. R. R. Tolkien's mythopoeic writing, unpublished in his lifetime, that forms the background to his ''The Lord of the Rings'', and which his son Christopher summarized in his compilation of ''The Silmaril ...
*
Gelion (company): A company that produces gell zinc-bromine batteries
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