/ Dictionary / Index S subsidiary coin: Meaning and Definition of Find definitions for: subsid'iary coin" Pronunciation: [key] a coin, esp. one made of silver, having a value less than that of the monetary unit. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. subsidiary subsidiary company Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language