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[mak-roh-noo-klee-uh s, -nyoo-] /ˌmæk roʊˈnu kli əs, -ˈnyu-/

noun, Biology.
the larger of the two types of occurring in ciliate protozoans, having a multiple set of chromosomes and functioning in cell metabolism and protein synthesis.
noun (pl) -clei (-klɪˌaɪ)
the larger of the two nuclei in ciliated protozoans Compare micronucleus

macronucleus mac·ro·nu·cle·us (māk’rō-nōō’klē-əs, -nyōō’-)
The larger of two nuclei present in ciliate protozoans, which controls the nonreproductive functions of the cell.
mac’ro·nu’cle·ar adj.


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