Horse tick Meaning, Definition & Usage

  1. noun winged fly parasitic on horses
    Hippobosca equina; horsefly.

WordNet

Definitions
  1. (Zoöl.), a winged, dipterous insect (Hippobosca equina), which troubles horses by biting them, and sucking their blood; called also horsefly, horse louse, and forest fly.

Webster 1913