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