macronucleus

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mac·ro·nu·cle·us

 (măk′rō-no͞o′klē-əs, -nyo͞o′-)
n. pl. mac·ro·nu·cle·i (-klē-ī′)
The larger of two nuclei present in ciliate protozoans, which controls nonreproductive functions of the cell, such as metabolism.

mac′ro·nu′cle·ar adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

macronucleus

(ˌmækrəʊˈnjuːklɪəs)
n, pl -clei (-klɪˌaɪ)
(Microbiology) the larger of the two nuclei in ciliated protozoans. Compare micronucleus
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

mac•ro•nu•cle•us

(ˌmæk roʊˈnu kli əs, -ˈnyu-)

n.
the larger of the two types of nuclei in ciliate protozoans, functioning in cell metabolism. Compare micronucleus.
[1890–95]
mac`ro•nu′cle•ar, adj.
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