Merriam-Webster's Collegiate® Dictionary, 11th Edition
OUNCE
I. noun see: one
Date: 14th century
1. a unit of weight equal to 1/12 troy pound, a unit of weight equal to 1/16 avoirdupois pound, a small amount , fluid ounce ,
II. noun
Etymology: Middle English unce lynx, from Middle French, alteration (by misdivision, as if l'once the ounce) of lonce, probably from Old Italian lonza, from Middle Greek lynk-, lynx, from Greek
Date: 1774
snow leopard