ounce (n.1)

unit of weight, the twelfth part of a pound, early 14c., from Old French once, unce, a measure of weight or time (12c.), from Latin uncia "one-twelfth part" (of a pound, a foot, etc.), from Latin unus "one" (from PIE root *oi-no- "one, unique"). The Latin word had been adopted in Old English 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 older Italian onza. It was used loosely from late 14c. for "a small quantity." Also used in Middle English as a measure of time (7.5 seconds) and length (about 3 inches). In figurative expressions and proverbs, an ounce of X is compared or contrasted with a pound of Y from 1520s.

ounce (n.2)

"wildcat," c. 1300, from Old French once "lynx" (13c.), from lonce, with l- mistaken as definite article, from Vulgar Latin *luncea, from Latin lyncea "lynx-like," from lynx (see lynx). Originally the common lynx, later extended to other large, spotted wildcats, now mainly used of the mountain-panther or snow leopard of Asia.

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Definitions of ounce from WordNet

ounce (n.)
a unit of apothecary weight equal to 480 grains or one twelfth of a troy pound;
Synonyms: troy ounce / apothecaries' ounce
ounce (n.)
a unit of weight equal to one sixteenth of a pound or 16 drams or 28.349 grams;
Synonyms: oz.
ounce (n.)
large feline of upland central Asia having long thick whitish fur;
Synonyms: snow leopard / Panthera uncia

Dictionary entries near ounce