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

Encyclopedia: Pyroclastic

• daisy wheel
• daisy-chain
• daisy-leaved grape fern
• fawning
• fax
• fax machine
• fay
• Fayetteville
• faze
• fazed
• FBI
• FBI agent
• FCC
• FCS
• FDA
• FDIC
• FDR
• Fe
• feabane mullet
• fealty
• fear
• fearful
• fearfully
• fearfulness
• fearless