/ Dictionary / Index M mild silver protein: Meaning and Definition of Find definitions for: mild' sil'ver pro'tein Pronunciation: [key] a compound of silver and a protein, applied to mucous membranes as a mild antiseptic. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Mildred mild steel Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language