Any dipterous fly of the family
Tabanidæ, that stings horses, and sucks their blood. [
1913 Webster]
"
Of these flies there are numerous species, both in Europe and America. They have a large proboscis with four sharp lancets for piercing the skin. Called also breeze fly. See Illust. under Diptera, and Breeze fly."
[
1913 Webster]