ounce

unssi

lumileopardi An avoirdupois ounce, weighing 1/16 of an avoirdupois pound, or 28.3495 grams.
A troy ounce, weighing 1/12 of a troy pound, or 480 grains, or 31.1035 grams.
A US fluid ounce, with a volume of 1/16 of a US pint, 1.804 687 cubic inches or 29.573 531 milliliters.
A British imperial fluid ounce, with a volume of 1/20 of an imperial pint, 1.733871 cubic inches or 28.413063 millilitres.
A little bit.

He didnt feel even an ounce of regret for his actions.''