biosphere - WordReference.com Dictionary of English

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biosphere

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Concise Oxford English Dictionary © 2008 Oxford University Press:
biosphere/ˈbʌɪəʊsfɪə(r)/

▶noun

1 the regions of the surface and atmosphere of the earth occupied by living organisms.

2 an artificial structure enclosing a self-contained ecosystem.

– derivatives
biospheric adjective.

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