WordReference Random House Unabridged Dictionary of American English © 2026
nucleo-, 
  1. a combining form representing nucleus, nuclear, or nucleic acid in compound words:nucleoprotein.

Collins Concise English Dictionary © HarperCollins Publishers::
nucleo-, (before a vowel) nucle- combining form
  1. nucleus or nuclear
  2. nucleic acid
Etymology: from Latin nucleus kernel, from nux nut
'nucleo-' also found in these entries (note: many are not synonyms or translations):
nucleoside - nucleotide - nuclide - chemonucleolysis - nucleocapsid - nucleophilic - nucleoplasm - nucleoprotein - nucleosome - nucleosynthesis

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


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