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mesosphere Syllabification: mes·o·sphere
Pronunciation: /ˈmezəˌsfi(ə)r/ /ˈmē-/

Definition of mesosphere in English:


The region of the earth’s atmosphere above the stratosphere and below the thermosphere, between about 30 and 50 miles (50 and 80 km) in altitude.
Example sentences
  • If the layers are characterized by the rate at which temperature changes with height, then the atmosphere is split into four layers: the troposphere, stratosphere, mesosphere, and thermosphere.
  • Nacreous and Noctilucent clouds form not in the part of the atmosphere in which we live, but much higher up, in the stratosphere and mesosphere.
  • They will also be able to find out more about the complex waves, tides and other mechanisms that link this region - known as the mesosphere - to the lower regions of the atmosphere.



Pronunciation: /ˌmezəˈsfi(ə)rik/ /ˌmē-/
Example sentences
  • The best viewing conditions are at middle latitudes near the summer solstice, when the mesospheric temperatures reach their lowest values and the twilight hours are at their longest.
  • Oscillations of 2 to 3 days period are found in February and March in the mesospheric emissions.
  • Given these evidences, we contend that there is a direct influence of ablating meteoroids on the topside of the mesospheric metal layer.

Definition of mesosphere in:

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