The Collaborative International Dictionary
Bowie knife \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.
Douglas Harper's Etymology Dictionary
1827, named for its inventor, U.S. fighter and frontiersman Col. James "Jim" Bowie (1799-1836), and properly pronounced "boo-ee."
Wiktionary
n. (alternative form of Bowie knife English)
Wikipedia
A Bowie knife (pronounced or ) is a pattern of fixed-blade fighting knife created by James Black in the early 19th century for Jim Bowie, who had become famous for his use of a large knife at a duel known as the Sandbar Fight.
Since the first incarnation, the Bowie knife has come to incorporate several recognizable and characteristic design features, although in common usage the term refers to any large sheath knife with a crossguard and a clip point. The knife pattern is still popular with collectors; in addition to various knife manufacturing companies there are hundreds of custom knife makers producing Bowies and variations.