Unit Definition (once [France]) The onça, once, oncia, onza is traditional names for the ounce unit in Romance languages. The French once equals 1/16 livre or about 30.59 grams (1.079 ounce).
Unit Definition (centigram) The centigram is a metric unit of mass equal to 10 milligrams or about 0.154 grain.
Weight/Mass 
