heterosphere

Fetched 2026-10-26 (cache).

Synonyms: petrosphere

Antonyms: petrosphere

Related words from Datamuse; suggestions, not definitions.

Noun

1. The upper part of the [[atmosphere]], above about 60 miles or 100 km, in which there is great variation in its composition.

Source: Wiktionary · CC BY-SA 4.0 (Wiktionary dump) · cached copy, not a rewrite.