/ Dictionary / Index P pentaerythritol: Meaning and Definition of Find definitions for: pen•ta•e•ryth•ri•tol Pronunciation: (pen"tu-i-rith'ri-tôl", -tol"), [key] — n. Chem. a white, crystalline, water-soluble powder, CHO, used chiefly in the manufacture of alkyd resins, varnishes, plasticizers, and explosives. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: pentaerythritol (Thesaurus) pentadecagon pentaerythritol tetranitrate Related Content Daily Word Quiz: serendipity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language