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upper air
noun
- the atmosphere above the lower portion of the troposphere.
Word History and Origins
Origin of upper air1
Example Sentences
Researchers were watching on November 17 to see if tiny meteorites burning up in the atmosphere were seeding the thin upper air with sodium atoms.
It is to be remembered, however, that a few of these bacteria may reach the sputum from the upper air-passages.
It floated out upon the night, over the housetops, the crescent of the river, losing itself in the silence of the upper air.
Once more Gwynne gazed down upon the sleepless city, where the lights seemed to powder the upper air with gold dust.
This is equipped with delicate instruments in considerable variety for the study of varying conditions of the upper air.
An eagle floated serenely on the upper air currents, automatically adjusting himself to their constant changing.
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