Terciado
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Terciado was an Iberian name for a variety of swords or sabres from the Low Middle Ages to the Renaissance, characterized by short, one-edged blades which were described as lacking a third of a usual blade's length (hence terciado, meaning lacking a third). It was generally considered either related or applied to a cutlass, although it was sometimes applied to a falchion too.
History
It was especially used as a naval weapon during the Age of Sail. Antonio Pigafetta identified as a terciado the swords wielded by the natives during the Battle of Mactan, comparing it to a greater sized scimitar.