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Moreover, where did ounces come from?

The word ounce ultimately comes from the Latin word uncia, meaning "one-twelfth." (This is also where we get the word inch.) In Italian, this became onzo, which is where we get both the word ounce and its abbreviation,oz.

Secondly, what Oz stands for? oz. is a common abbreviation for ounce, referring to several units of measure.

Also to know, what is an ounce based on?

As a unit of weight, the ounce derives from the Roman uncia (meaning “twelfth part”), which was ¹/₁₂ of a Roman foot or ounce. The standard or physical embodiment of the Roman foot, a copper bar, constituted the Roman pound standard and was divided along its length into 12 equal parts, called unciae.

Where does the abbreviation lbs come from?

The form lb is actually an abbreviation of the Latin word libra, which could mean a pound, itself a shortened form of the full expression, libra pondo, “pound weight”. The second word of this phrase, by the way, is the origin of the English pound.