Breadcrumb Home > Thesaurus > A Synonyms of auxin Find synonyms for: Noun 1. auxin, phytohormone, plant hormone, growth regulator usage: a plant hormone that promotes root formation and bud growth WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of auxin (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: felicitous Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language