/ Dictionary / Index P pickeringite: Meaning and Definition of Find definitions for: pick•er•ing•ite Pronunciation: (pik'ur-ing-īt", pik'ring-), [key] — n. a mineral, magnesia alum, occurring usually in the form of white fibrous masses. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Pickering picker-upper Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language