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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

Further information

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.