Skip to Content


Pronunciation: mi'kro-nu'kle-us


  1. A small nucleus in a large cell, or the smaller nuclei in cells that have two or more such structures.
  2. The smaller of the two nuclei in ciliates dividing mitotically and bearing specific inheritable material.

Synonym(s): gametic nucleus, germ nucleus, gonad nucleus, karyogonad, reproductive nucleus

See Also: macronucleus2

Disclaimer: This site is designed to offer information for general educational purposes only. The health information furnished on this site and the interactive responses are not intended to be professional advice and are not intended to replace personal consultation with a qualified physician, pharmacist, or other healthcare professional. You must always seek the advice of a professional for questions related to a disease, disease symptoms, and appropriate therapeutic treatments.
© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.