pico-

combining form

Definition of PICO-

: one trillionth (10⁻¹²) part of <picogram>

: very small <picornavirus>

International Scientific Vocabulary, probably from Spanish pico small amount, literally, peak, beak

Medical Dictionary

combining form

: one trillionth (10⁻¹²) part of <picogram>

: very small <picornavirus>

Next Word in the Dictionary: picogramPrevious Word in the Dictionary: picnometerAll Words Near: pico-

What made you want to look up pico-? Please tell us where you read or heard it (including the quote, if possible).

Put-downs with flair

How to use a word that (literally) drives some people nuts.

Test your vocab with our fun, fast game

Ailurophobia, and 9 other unusual fears