Ounce facts for kids
The ounce (abbreviated: oz, the old Italian word onza, now spelled oncia) is a unit of mass in a number of different systems, including various systems of mass that form part of the imperial and United States customary systems. Its size can vary from system to system. The most commonly used ounces used today are the international avoirdupois ounce and the international troy ounce.
Ounce Facts for Kids. Kiddle Encyclopedia.