/ Dictionary / Index T thermophilic: Meaning and Definition of Find definitions for: ther•mo•phil•ic Pronunciation: (thûr"mu-fil'ik), [key] — adj. growing best in a warm environment. (of bacteria) growing best at temperatures between 50° and 60°C. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. thermophile thermophone Related Content Daily Word Quiz: wizened Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language