Breadcrumb Home > Thesaurus > N Synonyms of nucleolus Find synonyms for: Noun 1. nucleolus, nucleole, organelle, cell organelle, cell organ usage: a small round body of protein in a cell nucleus; such organelles contain RNA and are involved in protein synthesis WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of nucleolus (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 12 Steps to a New Year New Year's Resolution to Slim Down? Martin Luther King Speeches Books of the Bible: Old Testament Books in Order ✖ Related Content Daily Word Quiz: voxpopuli Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language