noun
Refers to a small-scale representation of a larger whole, often used in philosophical or scientific contexts.
from German Mikrokosmos
この小さな村は、日本社会のミクロコスモスだ。
This small village is a microcosm of Japanese society.
マクロコスモス is the opposite concept, meaning 'macrocosm' or the larger universe that contains the microcosm.
Borrowed from German 'Mikrokosmos', ultimately from Greek 'mikros' (small) + 'kosmos' (world).