bow·ie knife /ˈbui, ˈbo-/
Bow·ie knife A knife with a strong blade from ten to fifteen inches long, and double-edged near the point; -- used as a hunting knife, and formerly as a weapon in the southwestern part of the United States. It was named from its inventor, Colonel James Bowie. Also, by extension, any large sheath knife.
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Bowie knife
n : a stout hunting knife with a single edge