- a volcanic rock, powdered and used in making a hydraulic cement
- a siliceous or siliceous-and-aluminous material that will, in finely divided form and in the presence of moisture, react with calcium hydroxide to form a cement
Also poz′zo·lan· or poz·zo·la′na
Origin of pozzuolanaItalian from Classical Latin puteolana (pulvie), (powder of) Puteoli (now Italian Pozzuoli), site of the quarries
- Alternative spelling of pozzolana.