[mahy-kroh-noo-klee-uh s, -nyoo-]
- the smaller of the two types of nuclei occurring in ciliate protozoans.
Origin of micronucleus
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for micronucleus
In the latter case it is often called the paranucleus or micronucleus.A Guide for the Study of Animals
The macronucleus is spherical and has one micronucleus attached.
Both the small nucleus (micronucleus) and the large nucleus (macronucleus) divide at each division of the body.A Critique of the Theory of Evolution
Thomas Hunt Morgan
The macronucleus is usually dorsal, elliptical, and cleft, with one micronucleus attached.
The macronucleus is central, spherical in form, and bears a single minute micronucleus.
- the smaller of two nuclei in ciliated protozoans, involved in reproductionCompare macronucleus
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
- A minute nucleus.
- The smaller of two nuclei in ciliate protozoans that contains genetic material and functions in reproduction.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.