hab·er·geon \ˈhabərjən, həˈbərj(ē)ən\noun orhau·ber·geon\ˈhȯb-, hȯˈ-\ (-s) Etymology: Middle English haubergeoun, from Middle French haubergeon, diminutive of hauberc — more at hauberk 1.: a medieval jacket of mail shorter than a hauberk 2.: hauberk