Meaning & use

biosphere

noun·Academic

The parts of Earth's surface, water, and atmosphere where living organisms exist.

See it in a sentence

Scientists study how pollution affects the delicate balance of the biosphere.

The biosphere includes everything from deep ocean trenches to mountain peaks where life survives.

A note on using this word

Biosphere is a scientific term encompassing all of Earth's ecosystems together, distinct from a single habitat or ecosystem, which refers to one specific area.

Words with a similar meaning

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