An avoirdupois ounce is a unit of mass widely used for weighing larger amounts of objects. There are a few synonyms for the word avoirdupois ounce, such as standard ounce, regular ounce, and commercial ounce. These terms are often interchangeable and are used to describe the same unit of mass, which is equivalent to 28.3495 grams. In the United States, an avoirdupois ounce is commonly used as a unit of weight for food products and other goods. Regardless of what it's called, this unit of mass is an important and necessary measure for many industries and activities that require accurate measurements of weight.