la onza - ounce, a small square of chocolateSpanish example: En España también se utilizaba la onza medicinal, que equivalía a 28,752 gramos, y que estaba dividida en 8 dracmas.
English example: In Spain they also used to use the medicinal ounce, which was the equivalent of 28.752 grams, and which was divided into eight drachmas.
Source: la onza - ounce, a small square of chocolate (https://www.123teachme.com/spanish_feeds/word_of_the_day/2023/10/11)