macronucleus

US:USA pronunciation: respellingUSA pronunciation: respelling(mak′rō no̅o̅′klē əs, -nyo̅o̅′-)


WordReference Random House Unabridged Dictionary of American English © 2026
mac•ro•nu•cle•us  (mak′rō no̅o̅′klē əs, -nyo̅o̅′-),USA pronunciation n. [Biol.]
  1. Microbiologythe larger of the two types of nuclei occurring in ciliate protozoans, having a multiple set of chromosomes and functioning in cell metabolism and protein synthesis. Cf. micronucleus. 
  • Neo-Latin; see macro-, nucleus
  • 1890–95
mac′ro•nu′cle•ar, adj. 

'macronucleus' also found in these entries (note: many are not synonyms or translations):
macronucleate - micronucleus

Forum discussions with the word(s) "macronucleus" in the title:


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