Breadcrumb Home > Dictionary > Index P pterido-: Meaning and Definition of Find definitions for: pterido- Pronunciation: [key] a combining form meaning “fern,” used in the formation of compound words: pteridology. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pteranodon pteridology ✖ Related Content Daily Word Quiz: deracinate Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language