Definition of peso

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pessary >

pe·so    (ps) KEY 

NOUN:
pl. pe·sos

Abbr. p. A unit of currency in Chile, Colombia, Cuba, Dominican Republic, Guinea-Bissau, Mexico, Philippines, and Uruguay. See Table at currency.

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ETYMOLOGY:
Spanish, from Latin pnsum, something weighed, from neuter past participle of pendere, to weigh; see (s)pen- in Indo-European roots