Meaning

noun a unit of apothecary weight equal to 480 grains or one twelfth of a pound

noun a unit of weight equal to one sixteenth of a pound or 16 drams or 28.349 grams

noun large feline of upland central Asia having long thick whitish fur

originFrom Middle English ounce, unce, from Middle French once, from Latin uncia (“Roman ounce, various similar units”), ultimately from Proto-Indo-European *óynos (“one”). Doublet of a, one, inch, uncia, onça, onza, oka, ouguiya, and awqiyyah.

Etymology from Wiktionary, CC BY-SA 3.0