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

micrometer

play
noun mi·crom·e·ter \mī-ˈkrä-mə-tər\

Definition of micrometer

  1. 1 :  an instrument used with a telescope or microscope for measuring minute distances

  2. 2 :  a caliper for making precise measurements that has a spindle moved by a finely threaded screw



Illustration of micrometer

Origin of micrometer

French micromètre, from micr- + -mètre -meter


First Known Use: 1670


2

micrometer

play
noun mi·cro·me·ter \ˈmī-krō-ˌmē-tər\

Definition of micrometer

  1. :  a unit of length equal to one millionth of a meter —called also micron — see metric system table



Origin of micrometer

International Scientific Vocabulary micr- + 3meter


First Known Use: 1880


MICROMETER Defined for Kids

micrometer

play
noun mi·crom·e·ter \mī-ˈkrä-mə-tər\

Definition of micrometer

  1. 1 :  an instrument used with a telescope or microscope for measuring very small distances

  2. 2 :  an instrument having a rod moved by fine screw threads and used for making exact measurements





Seen and Heard

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

WORD OF THE DAY

February 11, 2016

the holder of an office

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image33683556

How much does a batman (the Turkish unit of measurement) weigh?

2.2 pounds 16.96 pounds 196.5 pounds 100 pounds
Name That Thing

10 quick questions: hear them, spell them, and see how your skills compare to the crowd.

TAKE THE QUIZ
SCRABBLE® Sprint

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

TAKE THE QUIZ