Definitions for macronucleusˌmæk roʊˈnu kli əs, -ˈnyu-
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Random House Webster's College Dictionary
mac•ro•nu•cle•usˌmæk roʊˈnu kli əs, -ˈnyu-(n.)
the larger of the two types of nuclei in ciliate protozoans, functioning in cell metabolism.
Category: Microbiology
Ref: Compare micronucleus.
Origin of macronucleus:
1890–95
mac`ro•nu′cle•ar(adj.)
Wiktionary
macronucleus(Noun)
The larger the two nuclei present in ciliate protozoans; it controls the nonreproductive functions of the cell.
U.S. National Library of Medicine
Macronucleus
The larger of two types of nuclei in ciliate protozoans. It is the transcriptionally active nucleus of the vegetative cells as distinguished from the smaller transcriptionally inert GERMLINE MICRONUCLEUS.
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