Breadcrumb Home > Thesaurus > S Synonyms of sulcus Find synonyms for: Noun 1. sulcus, fissure usage: (anatomy) any of the narrow grooves in an organ or tissue especially those that mark the convolutions on the surface of the brain WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of sulcus (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: sectarian Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language