/ Dictionary / Index P preglacial: Meaning and Definition of Find definitions for: pre•gla•cial Pronunciation: (prē-glā'shul), [key] — adj. Geol. prior to a given glacial epoch, esp. the Pleistocene. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Pregl pregnable Related Content Daily Word Quiz: pugilist Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language