germ nucleus


mi·cro·nu·cle·us

(mī'krō-nū'klē-ŭs), 1. A small nucleus in a large cell, or the smaller nuclei in cells that have two or more such structures.
See also: macronucleus (2). 2. The smaller of the two nuclei in ciliates dividing mitotically and bearing specific inheritable material.
See also: macronucleus (2). Synonym(s): gametic nucleus, germ nucleus, gonad nucleus, karyogonad, reproductive nucleus