oz

ounce

 (oz) [owns]

1. in the apothecaries' system, a unit of weight equal to ¹⁄₁₂ of a pound or 480 grains (31.103 grams); symbol ℥. See also Table of Weights and Measures in the Appendix.

2. in the avoirdupois system, a unit of weight equal to ¹⁄₁₆pound (28.3495 grams).

fluid ounce in the apothecaries' system, a unit of liquid measure equal to 8 fluid drams (29.57 ml). See also Table of Weights and Measures in the Appendix.

a unit of capacity (liquid measure) of the apothecaries' system. In the United States, it is 8 fluid drams, one sixteenth of a pint, or the equivalent of 29.57 mL. In Great Britain, it is an imperial ounce and is 8 (imperial) fluid drams but is one twentieth of an (imperial) pint, or 28.41 mL. See also Table of Weights and Measures in the Appendix.

oz

ounce.

oz

abbreviation for ounce.

Oz

British slang for Australia.

oz

ounce.