homunculus

ho·mun·cu·lus

noun \hō-ˈməŋ-kyə-ləs\

plural ho·mun·cu·li \-ˌlī, -ˌlē\

Definition of HOMUNCULUS

: a miniature adult that in the theory of preformation was held to inhabit the germ cell and to produce a mature individual merely by an increase in size