noun, plural mi·cro·nu·cle·i [mahy-kroh-noo-klee-ahy, -nyoo-] /ˌmaɪ kroʊˈnu kliˌaɪ, -ˈnyu-/. Biology.
Related formsmi·cro·nu·cle·ar, adjective
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|Worrallo Whitney
The macronucleus is spherical and has one micronucleus attached.
The macronucleus is usually single, elliptical in form, and centrally placed; one micronucleus.
The macronucleus is spherical, centrally placed, and with one micronucleus closely applied.
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