Merriam-Webster Collegiate Dictionary - barbel

 I. noun  Etymology: Middle English, from Anglo-French, from Vulgar Latin *~lus, diminutive of Latin barbus ~, from barba beard — more at beard  Date: 14th century a European freshwater cyprinid fish (Barbus barbus) with four ~s on its upper jaw; also any of various closely related fishes  II. noun  Etymology: obsolete French, from Middle French, diminutive of barbe barb, beard  Date: 1601 a slender tactile process on the lips of certain fishes (as catfishes)