Breadcrumb Home > Thesaurus > C Synonyms of ci Find synonyms for: Noun 1. curie, Ci, radioactivity unit usage: a unit of radioactivity equal to the amount of a radioactive isotope that decays at the rate of 37,000,000,000 disintegrations per second Adjective 1. hundred and one, one hundred one, 101, ci, cardinal (vs. ordinal) usage: being one more than one hundred WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of ci (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: demagogue Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language