Definition of biosphere noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˈbaɪəʊsfɪə(r)//
; NAmE NAmE//ˈbaɪoʊsfɪr//
[singular] (specialist) The Earth and the atmosphere
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the part of the earth’s surface and atmosphere in which plants and animals can live See related entries: The Earth and the atmosphere Word Originlate 19th cent.: coined in German from Greek bios ‘life’ + sphaira ‘ball’.
See the Oxford Advanced American Dictionary entry: biosphere