Geryon jĕr´ēən, jərĭ´ən [key], in Greek mythology, three-bodied monster who, with his dog Orthrus, watched over a great herd of cattle. He and Orthrus were killed by Hercules when, as his 10th labor, he stole the cattle.

The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2023, Columbia University Press. All rights reserved.

See more Encyclopedia articles on: Folklore and Mythology