Breadcrumb Home > Dictionary > Index R regulant: Meaning and Definition of Find definitions for: reg•u•lant Pronunciation: (reg'yu-lunt), [key] — n. a substance, as a chemical, used to control or regulate: herbicides and fungicides as regulants for plant growth. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. regulable regular TrendingHere are the facts and trivia that people are buzzing about. The Book of 1 Corinthians: Summary Current Events This Week: June 2023 Languages Spoken in Each Country of the World Aesop's Fables: Aesop's Fables Milestones in Environmental Protection The 12 Labors of Hercules (In Order) ✖ Related Content Daily Word Quiz: rort Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language