/ Dictionary / Index T thermocline: Meaning and Definition of Find definitions for: ther•mo•cline Pronunciation: (thûr'mu-klīn"), [key] — n. a layer of water in an ocean or certain lakes, where the temperature gradient is greater than that of the warmer layer above and the colder layer below. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. thermochemistry thermocoagulation Related Content Daily Word Quiz: abstain Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language