mi·cro·cosm

– noun
1. a little world; a world in miniature.
2. anything that is regarded as a world in miniature.
3. human beings, humanity, society, or the like, viewed as an epitome or miniature of the world or universe.

mac·ro·cosm

– noun
1. the great world or universe; the universe considered as a whole.
2. the total or entire complex structure of something.
3. a representation of a smaller unit or entity by a larger one, presumably of a similar structure.