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Definition of Golden Fleece
1. Noun. In Greek mythology, a fleece of gold owned by the king of Colchis and guarded in a sacred grove by a dragon; recovered by Jason and the Argonauts. 
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1. Noun. In Greek mythology, a fleece of gold owned by the king of Colchis and guarded in a sacred grove by a dragon; recovered by Jason and the Argonauts.