Definitions

1. noun

the part of the Earth’s atmosphere containing most of the chemical compounds that are essential to life

“The chemosphere is where most of the Earth’s atmospheric oxygen is produced.”

2. noun

the layer of the atmosphere where chemicals and pollutants can accumulate

“The chemosphere is often affected by industrial activities that release toxic chemicals into the air.”

3. noun

a hypothetical region in a planet’s atmosphere where chemical reactions occur

“The chemosphere on Mars is thought to be responsible for the formation of its reddish hue.”