- ounce; ounces.
Origin of oz.
abbreviation of Italian onza
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Word Origin and History for oz.
abbreviation of ounce (n.1), 1540s, from Italian oz. (15c.), abbreviation of onza.
Online Etymology Dictionary, © 2010 Douglas Harper