peso

pe·so

noun \ˈpā-(ˌ)sō, ˈpe-\

: the basic unit of money of several Latin-American countries and the Philippines; also : a coin or bill representing one peso

plural pesos

Full Definition of PESO

1

:  an old silver coin of Spain and Spanish America equal to eight reals

2

— see money table

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Origin of PESO

Spanish, literally, weight, from Latin pensum — more at poise

First Known Use: 1555