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Definition of Horn fly
1. Noun. Small black European fly introduced into North America; sucks blood from cattle especially at the base of the horn.
Exact synonyms: Haematobia Irritans
Generic synonyms: Fly
Group relationships: Genus Haematobia, Haematobia
Generic synonyms: Fly
Group relationships: Genus Haematobia, Haematobia
Medical Definition of Horn fly
1. A major pest of cattle in the Northern Hemisphere that transmits the filarial parasite Stephanofilaria stilesi. Synonym: Haematobia irritans. (05 Mar 2000)