Microcosm
Microcosm , noun
[French microcosme, Latin microcosmus, from Greek mikro`s small + ko`smos the world.]
1.
A little world; a miniature universe. Hence (so called by Paracelsus), a man, as a supposed epitome of the exterior universe or great world. Opposed to macrocosm. — Shakespeare
2.
A relatively small object or system considered as representative of a larger system of which it is part, exhibiting many features of the complete system.