Definition of macronucleus
:a relatively large densely staining nucleus of most ciliate protozoans that is derived from micronuclei and controls various nonreproductive functions
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Origin and Etymology of macronucleus
Medical Dictionary
macronucleus
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noun
mac·ro·nu·cle·us
\
ˌmak-rō-ˈn(y)ü-klē-əs
\
medical Definition of macronucleus
plural macronuclei
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\-ˌī\
also macronucleuses
:a relatively large densely staining nucleus of most ciliate protozoans that is derived from micronuclei and controls various nonreproductive functions — compare micronucleus
Learn More about macronucleus
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Britannica.com: Encyclopedia article about macronucleus
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