/ Dictionary / Index T thermistor: Meaning and Definition of Find definitions for: therm•is•tor Pronunciation: (thur-mis'tur, thûr'mu-stur), [key] — n. Electronics. a resistor whose action depends upon changes of its resistance material with changes in temperature. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: thermistor (Thesaurus) thermionic valve Thermit Related Content Daily Word Quiz: impetuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language