Breadcrumb Home > Thesaurus > C Synonyms of circadian Find synonyms for: Adjective 1. circadian usage: of or relating to biological processes occurring at 24-hour intervals; "circadian rhythms" WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of circadian (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Chinese New Year History, Meaning, and Celebrations Current Events This Week: February 2024 Valentine's Day Valentine's Day History Mardi Gras 30 "Charlie and the Chocolate Factory" Quotes ✖ Related Content Daily Word Quiz: crepuscular Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language