/ Dictionary / Index A aluminum soap: Meaning and Definition of Find definitions for: alu'minum soap" Pronunciation: [key] — Chem. Chem. any of the salts formed by higher carboxylic acids and aluminum, as aluminum oleate, aluminum palmitate, and aluminum stearate. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. aluminum silicate aluminum sulfate Related Content Daily Word Quiz: hedonist Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language