Meaning & use
pico-
Last updated
A metric prefix meaning one trillionth (10⁻¹²) of a unit.
See it in a sentence
A picosecond is one trillionth of a second, a unit used in measuring extremely fast processes.
Scientists measured the laser pulse in picoseconds.
A note on using this word
Part of the standard set of metric prefixes; smaller than 'nano-' (10⁻⁹) and used mainly in scientific and technical measurements.
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