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