Breadcrumb Home > Dictionary > Index I isothermal: Meaning and Definition of Find definitions for: i•so•ther•mal Pronunciation: (ī"su-thûr'mul), [key] — adj. occurring at constant temperature. pertaining to an isotherm. —n. an isotherm. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: isothermal (Thesaurus) isotherm isothermal process 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: soupon Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language