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|part of speech:
||a unit of weight equal to one sixteenth of a pound or 28.350 grams in the avoirdupois weight system, and equal to one twelfth of a pound or 31.1051 grams in the apothecaries' weight and the troy weight systems. (abbr.: oz.)
||see fluid ounce.
||any tiny or very small amount.
He does not have an ounce of common sense.
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