Note:  Do not rely on this information. It is very old.


Ounce. Ounce and Inch are doublets, both being derived from the Latin Uncia, the twelfth part of any weight or measure. An ounce is the twelfth part of a pound troy, but the sixteenth part of a pound avoirdupois. In the former it contains 480 grains (20 dwt.), in the latter 437-1/2 grains.