/ Dictionary / Index A attapulgite: Meaning and Definition of Find definitions for: at•ta•pul•gite Pronunciation: (at"u-pul'jīt), [key] — n. a clay mineral, basic hydrous silicate of magnesium and aluminum, the active ingredient of fuller's earth. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Attalus III attar Related Content Daily Word Quiz: abstain Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language