The Roman ounce, equal to about 27.2875 grams of 0.9625 ounce avoirdupois. The word uncia means a one-twelfth part (there were 12 ounces in a Roman pound). The words "ounce" and "inch" are derived from it.
The Roman ounce, equal to about 27.2875 grams of 0.9625 ounce avoirdupois. The word uncia means a one-twelfth part (there were 12 ounces in a Roman pound). The words "ounce" and "inch" are derived from it.