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Vinony

troposphere

noun

  1. lower part of the atmosphere
L44784 on Wikidata ↗

Wiktionary

noun

Etymology: Borrowed from French troposphère. Equivalent to tropo- + -sphere.

  1. The lower levels of the atmosphere extending from the surface of the Earth or another celestial body up to the tropopause. It is characterized by convective air movements and a large vertical temperature change.