pico-; 10^-12
SI prefix meaning one trillionth (10^-12). Used in scientific and technical contexts with units such as ピコ秒 (picosecond) or ピコファラド (picofarad).
This laser generates pulses on the order of picoseconds.
The capacitor's capacitance is only a few picofarads.
picosecond
picocurie
From the international SI prefix 'pico-', ultimately from Italian 'piccolo' meaning small.