avoirdupois ounce
A unit of weight in the avoirdupois system, equal to about 28.35 grams. Used in contexts where the distinction from troy ounces or fluid ounces is important.
In this recipe, please measure the flour in avoirdupois ounces.
Compound of 常衡 (じょうこう, 'avoirdupois') and オンス ('ounce'). 常衡 is a Japanese-coined term for the avoirdupois weight system.