/ Dictionary / Index D dyna-: Meaning and Definition of Find definitions for: dyna- Pronunciation: [key] a combining form meaning “power,” used in the formation of compound words: dynamotor. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. dyn dynameter Related Content Daily Word Quiz: garrulous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language