MACRONUCLEUS is validvalid

[n MACRONUCLEI, MACRONUCLEUSES]

170,568 of 196,601 in NWL2023·also valid in CSW24

a relatively large densely staining nucleus of most ciliate protozoans that is derived from micronuclei and controls various nonreproductive functions [n MACRONUCLEI or MACRONUCLEUSES]