/ Dictionary / Index I -iformes: Meaning and Definition of Find definitions for: -iformes Pronunciation: [key] a combining form used in taxonomic names of animals, esp. orders of birds and fish, meaning “having the form of ”: Beryciformes; Passeriformes. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. I formation I.F.S. Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language