Definition of mesocosm in English:
mesocosm
noun
Ecology
An enclosed and essentially self-sufficient (but not necessarily isolated) experimental environment or ecosystem that is on a larger scale than a laboratory microcosm.
Origin
1980s. From meso- + -cosm.
Pronunciation
mesocosm
/ˈmɛsə(ʊ)ˌkɒz(ə)m/ 
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