Ounces

ounce

1 [ouns]
noun
1.
a unit of weight equal to 437.5 grains or 1/16 pound (28.35 grams) avoirdupois.
2.
a unit of 480 grains, 1/12 pound (31.1 grams) troy or apothecaries' weight.
4.
a small quantity or portion.

Origin:
1350–1400; Middle English unce < Middle French < Latin uncia twelfth part, inch, ounce, derivative of unus one

Dictionary.com Unabridged

ounce

2 [ouns]
noun

Origin:
1300–50; Middle English unce lynx < Anglo-French; Old French once, variant of lonce (erroneously taken as l'once the ounce) < Vulgar Latin *luncea, derivative of Latin lync- (stem of lynx) lynx

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World English Dictionary
ounce1 (aʊns)
 
n
1.  oz a unit of weight equal to one sixteenth of a pound (avoirdupois); 1 ounce is equal to 437.5 grains or 28.349 grams
2.  a unit of weight equal to one twelfth of a Troy or Apothecaries' pound; 1 ounce is equal to 480 grains or 31.103 grams
3.  short for fluid ounce
4.  a small portion or amount
 
[C14: from Old French unce, from Latin uncia a twelfth; from ūnus one]

ounce2 (aʊns)
 
n
another name for snow leopard
 
[C18: from Old French once, by mistaken division of lonce as if l'once, from Latin lynx]

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Etymonline
Word Origin & History

ounce
"unit of weight," early 14c., from O.Fr. unce (12c.), from L. uncia "one-twelfth part" (of a pound, foot, etc.), from L. unus "one" (see one). The L. word had been adopted in O.E. as ynce (see inch). It was one-twelfth of a pound in the Troy system
of weights, but one-sixteenth in avoirdupois. Abbreviation oz. is from It. onza. Also used in M.E. as a measure of time (7.5 seconds) and length (about 3 inches).

ounce
"wildcat," c.1300, from O.Fr. once, from lonce, with l- mistaken as definite article, from V.L. *luncea, from L. lyncea "lynx-like," from lynx (see lynx). Originally the common lynx, later extended to other wildcats, now mainly used of the mountain-panther or snow leopard of Asia.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

ounce (ouns)
n.
Abbr. oz, oz.

  1. A unit of weight in the U.S. Customary System, an avoirdupois unit equal to 437.5 grains or 28.35 grams.

  2. A unit of apothecary weight equal to 480 grains or 31.10 grams.

  3. A fluid ounce.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
ounce   (ouns)  Pronunciation Key 
  1. A unit of weight in the US Customary System equal to 1/16 of a pound or 437.5 grains (28.35 kilograms). See Table at measurement.

  2. See fluid ounce.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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