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Medical Definition of Chrysops
1. The deerfly, a genus of biting flies with about 80 North American species, characterised by a splotched wing pattern; Chrysops discalis is a vector of Francisella tularensis in the U.S.; Chrysops dimidiatus and Chrysops silaceus are the principal vectors of Loa loa in west Africa. Origin: G. Chrysos, gold, + ops, eye (05 Mar 2000)