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1. A Roman unit of mass, usually equivalent to 327 g.
2. A traditional Spanish unit of mass, usually around 460 g.
3. A traditional Portuguese unit of mass, usually equivalent to 345 g and particularly used for trade in medicines.
4. Synonym of arratel, a separate Portuguese unit of mass, usually around 460 g.
5. Synonym of pound, a notional pound of silver as a money of account, especially in medieval contexts.

الجمع libras