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Definitions from WordNet

Definitions from the Web

Mesosphere

The mesosphere is the layer of the Earth's atmosphere that lies above the stratosphere and below the thermosphere. It extends from about 50 kilometers to 85 kilometers above the Earth's surface.

Part of Speech: Noun

Sense 1:

A region of the Earth's atmosphere

Example Sentence:

The mesosphere is the coldest layer of the atmosphere, with temperatures dropping to minus 90 degrees Celsius.

Sense 2:

A region in planetary atmosphere

Example Sentence:

The mesosphere of Mars is mostly composed of carbon dioxide.

Part of Speech: Adjective

Sense 1:

Relating to or characteristic of the mesosphere

Example Sentence:

Scientists study mesospheric phenomena such as noctilucent clouds.

Sense 2:

Local term

Example Sentence:

In the local region, they refer to the mesosphere as the "middle sky".