1.NounHuman nature or the human body as representative of the wider universe; man considered as a miniature counterpart of divine or universal nature. .mw-parser-output .defdate{font-size:smaller}
2.NounThe human body; a person.
3.NounA smaller system which is seen as representative of a larger one.
4.NounA small natural ecosystem; an artificial ecosystem set up as an experimental model.