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