noun
Refers to a small-scale system that mirrors a larger one, often contrasted with 大宇宙 (macrocosm). Used in philosophy, science, and metaphorical contexts.
See also: 大宇宙
人間の体は小宇宙だと言われることがある。
The human body is sometimes said to be a microcosm.
この生態系は地球全体の小宇宙のようなものだ。
This ecosystem is like a microcosm of the entire Earth.