Draft:Pico-

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Pico- (/ˈpaɪ.koʊ/ or /ˈpi.koʊ/; symbol p) is a metric prefix denoting a factor of one trillionth in the short scale (10-12 or 0.000 000 000 001; one billionth in the long scale). Its usage was officially endorsed by CGPM in 1960. The prefix is borrowed from Spanish pico, meaning "speck".

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