one trillionth part of; the factor 10: picometer
Origin of pico-probably ; from Italian piccolo, small
- One trillionth (10−12): picosecond.
- Very small: picornavirus.
Origin of pico-Spanish pico, beak, small quantity, from Latin beccus, beak, of Celtic origin (influenced by Spanish picar, to prick).
- An island in the Azores.