oz.
- ounce; ounces.
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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.
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Online Etymology Dictionary, © 2010 Douglas Harper