follow Dictionary.com

Your favorite word could be our Word of the Day!

seafloor spreading

noun
1.
a process in which new ocean floor is created as molten material from the earth's mantle rises in margins between plates or ridges and spreads out.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source
Examples from the web for sea floor spreading
  • He claimed that this process, now called subduction, destroys the surface formed by sea floor spreading.
sea floor spreading in Culture

sea floor spreading definition


The process by which new material that lies under the ocean rises and pushes the existing tectonic plates aside, creating new crust as it does so.

Note: Sea floor spreading is making the Atlantic Ocean wider by a few inches each year.
The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Cite This Source

Word of the Day

Difficulty index for seafloor spreading

Few English speakers likely know this word

Word Value for sea

3
3
Scrabble Words With Friends

Nearby words for sea floor spreading