Did you mean microcosm?
microcosm
noun
°a smaller system which is representative of or analogous to a larger one.
"Though our town is small and provincial, it is a true microcosm to the country as a whole."
°(archaic) a small, complete world.
"1608: If you see this in the map of my microcosm, follows it that I am known well enough too? — Shakespeare, , ii 1"