asthenosphere Hear it!

asthenosphere definition

as·theno·sphere (as t̸hen′ə sfir′)

noun

a zone in the upper mantle of the earth, consisting of hot, plastic rock, that underlies the solid lithosphere

Etymology: < Gr asthenēs, weak (see asthenia) + -o- + -sphere

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

Comments
Improve this definition.
Do you have more to add? Share your linguistic knowledge or observation.
/Register to save your comments.