Breadcrumb Home > Thesaurus > F Synonyms of fibrillation Find synonyms for: Noun 1. fibrillation, twitch, twitching, vellication usage: muscular twitching involving individual muscle fibers acting without coordination 2. fibrillation, branching, ramification, fork, forking usage: act or process of forming fibrils WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of fibrillation (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Hanukkah Origins of the Christmas Holiday Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 Krampus: The Christmas Devil Kwanzaa ✖ Related Content Daily Word Quiz: meretricious Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language