thermosphere

noun

ther·mo·sphere | \ ˈthər-mə-ˌsfir

How to pronounce thermosphere (audio)

\

Definition of thermosphere

: the part of the earth's atmosphere that begins at about 50 miles (80 kilometers) above the earth's surface, extends to outer space, and is characterized by steadily increasing temperature with height

Other Words from thermosphere Example Sentences Learn More about thermosphere

Keep scrolling for more

Examples of thermosphere in a Sentence

Recent Examples on the Web

The goal is to figure out the particle makeup of the thermosphere and ionosphere, known as the neutral atmosphere and map its changing temperatures. — Richard Tribou, OrlandoSentinel.com, "NASA hitches ride on commercial satellite for UCF-led atmosphere study," 26 Jan. 2018 Richard Branson licensed the technology for Virgin Galactic, his space tourism gambit, which aims to start regular visits to the thermosphere by 2012. — Carl Hoffman, WIRED, "Virgin Galactic’s Space-Grazing Aircraft Is Ready for Liftoff," 15 Nov. 2009

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

Keep scrolling for more

Learn More about thermosphere

Dictionary Entries near thermosphere

thermostimulation

Statistics for thermosphere

Look-up Popularity

Time Traveler for thermosphere

The first known use of thermosphere was circa 1950

See more words from the same year

Comments on thermosphere

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

WORD OF THE DAY

gritty

showing courage and determination

Test Your Vocabulary

Words for Summer: A Quiz

Which of the following words means “of or relating to summer”?

Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ

SCRABBLE® Sprint

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

TAKE THE QUIZ