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

nano-

combining form

Simple Definition of nano-

  • : one billionth part of something

Source: Merriam-Webster's Learner's Dictionary

Full Definition of nano-

  1. 1 :  one billionth (10−9) part of <nanosecond>

  2. 2 :  nanotechnology <nanomachine>

  3. 3 :  nanoscale <nanoparticle> <nanotube>

Origin of nano-

International Scientific Vocabulary, from Greek nanos dwarf


Learn More about nano-


Seen and Heard

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

WORD OF THE DAY

the range of perception or understanding

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

alt-5746713d76276

Which of these is a synonym of nonplus?

perplex disapprove reduce soothe
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