/ Dictionary / Index P polyhistor: Meaning and Definition of Find definitions for: pol•y•his•tor Pronunciation: (pol"ē-his'tur), [key] — n. a person of great and varied learning. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. polyhedron polyhydric Related Content Daily Word Quiz: penury Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language