Breadcrumb Home > Thesaurus > S Synonyms of sidereal Find synonyms for: Adjective 1. sidereal usage: of or relating to the stars or constellations; "sidereal bodies"; "the sidereal system" 2. sidereal (vs. civil) usage: (of divisions of time) determined by daily motion of the stars; "sidereal time" WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of sidereal (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: apotheosis Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language