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Oz1

[oz]
noun Australian Slang.
  1. Australia.
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Origin of Oz1

jocular back formation from Aussie (with voiced sibilant)

Oz2

[oz]
noun
  1. Land of Oz.
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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

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British Dictionary definitions for oz

oz

oz.

abbreviation for
  1. ounce
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Word Origin

from Italian onza

Oz

noun
  1. Australian slang Australia
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for oz

Oz

mythical land in L. Frank Baum's "The Wonderful Wizard of Oz" (1900) and sequels; according to an anecdote written by Baum in 1903, inspired by a three-drawer desktop cabinet letter file, the last drawer labeled O-Z. As Australian slang for "Australia," attested by 1983.

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oz.

abbreviation of ounce (n.1), 1540s, from Italian oz. (15c.), abbreviation of onza.

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Online Etymology Dictionary, © 2010 Douglas Harper

oz in Medicine

oz

abbr.
  1. ounce
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

oz in Science

oz

  1. Abbreviation of ounce
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.