Cite
 

Meaning of thermosphere

ther•mo•sphere

Pronunciation: (thûr'mu-sfēr"), [key]
— n.
  1. the region of the upper atmosphere in which temperature increases continuously with altitude, encompassing essentially all of the atmosphere above the mesosphere.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
See also: