1. Made up of or containing rock fragments or ash from a volcanic eruption

Encyclopedia: Pyroclastic

• unpolitical
• unpolled
• unpolluted
• unpompous
• unpopular
• unpopularity
• unpopulated
• unportable
• unposed
• unpotted
• unpowered
• unpractical
• unpracticed
• unpractised
• unprecedented
• unprecedentedly
• unpredictability
• unpredictable
• unpredictably
• unpredicted
• unpredictive
• unprejudiced
• unpremeditated
• unprepared
• unprepossessing