microbeam

noun mi·cro·beam \ ˈmī-krō-ˌbēm \

Definition of microbeam

:a beam of radiation of small cross section
  • a focused laser microbeam
  • a microbeam of electrons

First Known Use of microbeam

1950


Medical Dictionary

microbeam

noun mi·cro·beam \ ˈmī-krō-ˌbēm \

medical Definition of microbeam

:a beam of radiation of small cross section
  • a laser microbeam

Seen and Heard

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

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

serious difficulty or misfortune

Get Word of the Day daily email!

Test Your Vocabulary

The Exceptions Quiz III

  • one-green-toy-robot-amidst-many-red-toy-robots
  • Which of these words does not mean "nonsense"?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
Bee Cubed

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

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!