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