/ Dictionary / Index W wing formula: Meaning and Definition of Find definitions for: wing' for"mula Pronunciation: [key] — Ornith. Ornith. a numerical representation of the relative lengths of the primary feathers of a bird's wing, used in identifying similar species, as flycatchers. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. wing-footed wingless Related Content Daily Word Quiz: sinister Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language