/ Dictionary / Index P pebble heater: Meaning and Definition of Find definitions for: peb'ble heat"er Pronunciation: [key] a heat exchanger utilizing refractory pellets to store and give off heat. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pebble dash pebbly Related Content Daily Word Quiz: cetacean Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language