Breadcrumb Home > Dictionary > Index P pyroclastic: Meaning and Definition of Find definitions for: py•ro•clas•tic Pronunciation: (pī"ru-klas'tik), [key] — adj. Geol. composed chiefly of fragments of volcanic origin, as agglomerate, tuff, and certain other rocks; volcaniclastic. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pyrochlore pyroconductivity TrendingHere are the facts and trivia that people are buzzing about. The Book of Philippians: Summary Current Events This Week: May 2023 Preamble of the United Nations Charter Queen Victoria Books of the Bible: New Testament Books in Order The 88 Recognized Constellations ✖ Related Content Daily Word Quiz: serendipity Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language