/ Dictionary / Index S silicone rubber: Meaning and Definition of Find definitions for: sil'icone rub'ber Pronunciation: [key] any of the synthetic rubbers made from silicone elastomers. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. silicone siliconized Related Content Daily Word Quiz: fidelity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language