What is a ratl?

1 ratl = 406.25 grams = 14.328 ounces (.8955 pound) (Technically, a ratl = 144 dirham (drachms), but in practice these measures often varied in the marketplace.) This is the measurement for the avoirdupois ounce (dry ounce) used in the United States. Where one fluid ounce = 1.04 avoirdupois ounces, a ratl contains approx. 14.90 fluid ounces, that is, close to an American pint of liquid (which is 16 fl. oz.)