Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary
1

micro

play
adjective mi·cro \ˈmī-(ˌ)krō\

Definition of micro

  1. 1 :  very small; especially :  microscopic

  2. 2 :  involving minute quantities or variations



Origin of micro

micr-


First Known Use: 1923

Other Chemical Engineering Terms


2

micro

noun mi·cro

Definition of micro

plural micros



1971

First Known Use of micro

1971

Other Computer-Related Terms


Medical Dictionary

micro

play
adjective mi·cro \ˈmī-(ˌ)krō\

Medical Definition of micro

  1. 1:  very small; especially :  microscopic

  2. 2involving minute quantities or variations




Learn More about micro

  1. Medical Dictionary: Definition of "micro" Spanish Central: Translation of "micro" Britannica English: Translation of "micro" for Arabic speakers


Seen and Heard

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

WORD OF THE DAY

the Celtic May Day festival

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image567572573

Which of these is a synonym of unctuous?

prompt oily maudlin angry
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