Last modified on 19 June 2013, at 23:12

macronucleus

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macronucleus (plural macronuclei)

  1. (biology) The larger of the two nuclei present in ciliate protozoans; it controls the nonreproductive functions of the cell.
    • 1890 Proceedings, American Philosophical Society
      These binucleated forms have one macronucleus functional and another sexual micronucleus which is not functional in the ordinary life processes of the species.

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