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bi·o·sphere
 biosphere
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- pronunciation:
- baI
 s
fir
- features:
- Word Parts
| part of speech: |
noun |
| definition 1: |
the parts of the earth and its atmosphere that can support the existence of living things. The biosphere includes areas of water and air, and of land both above and below the ground.
Tropical rainforests are home to the greatest variety of plants and animals in Earth's biosphere. |
| definition 2: |
all living organisms together with the environments in which they are able to exist; all earth's ecosystems combined.
Plants, fungi, fish, tigers, birds, humans, algae, and bacteria are some of the living things that are part of Earth's biosphere. |
| related words: |
globe, world |
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