Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

pico-

combining form

Definition of pico-

  1. 1 :  one trillionth (10−12) part of <picogram>

  2. 2 :  very small <picornavirus>



Origin and Etymology of pico-

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


Medical Dictionary

pico-

combining form

Medical Definition of pico-

  1. 1:  one trillionth (10−12) part of <picogram>

  2. 2:  very small <picornavirus>




Learn More about pico-

  1. Medical Dictionary: Definition of pico- Britannica.com: Encyclopedia article about pico-


Seen and Heard

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

WORD OF THE DAY

to criticize in a loud and angry way

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

confounded-person

Which is a synonym of indolent?

frenetic melancholy philistine lazy
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ