D defs.my
Entry 2 senses Webster, 1913

Microcosm

/mīk'-rək-äzˌ-əm/ · Mi·cro·cosm · IPA /ˈmaɪ.kɹəˌkɑz.əm/
01 n. A little world; a miniature universe. Hence (so called by Paracelsus), a man, as a supposed epitome of the exterior universe or great worl…
  1. 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.
  2. 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.