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oz.

  1. 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