/ Dictionary / Index P pipestone: Meaning and Definition of Find definitions for: pipe•stone Pronunciation: (pīp'stōn"), [key] — n. a reddish argillaceous stone used by North American Indians for making tobacco pipes. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pipestem pipet Related Content Daily Word Quiz: supine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language