coronal mass ejection

noun

Definition of coronal mass ejection

:a tremendous outburst of energy from the corona of the sun that can cause disruptions in the earth's geomagnetic field
  • As they had for the January eruption, the researchers relied on an armada of spacecraft to track the disturbance, known as a coronal mass ejection because it originates in the sun's outer atmosphere, or corona.
  • —R. Cowen
abbreviation CME — compare solar flare

Recent Examples of coronal mass ejection from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'coronal mass ejection.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of coronal mass ejection

1974


Seen and Heard

What made you want to look up coronal mass ejection? 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

to praise usually to excess

Get Word of the Day daily email!

Test Your Vocabulary

Find the Cousins

  • a-large-tree-with-many-branches
  • Which pair shares a common word ancestor?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
SCRABBLE® Sprint

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!