Pronunciation: (hak'u-môr", -mōr"), [key]
1. a simple looped bridle, by means of which controlling pressure is exerted on the nose of a horse, used chiefly in breaking colts.
2. Western U.S.any of several forms of halter used esp. for breaking horses.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.