Breadcrumb Home > Thesaurus > O Synonyms of ornithine Find synonyms for: Noun 1. ornithine, amino acid, aminoalkanoic acid usage: an amino acid that does not occur in proteins but is important in the formation of urea WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of ornithine (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