pozzuolana

/ ˌpɒtsəˈlɑːnə; ˌpɒtswəˈlɑːnə /

noun

1. a type of porous volcanic ash used in making hydraulic cements
2. any of various artificial substitutes for this ash used in cements

Word History and Origins

Origin of pozzuolana¹

C18: from Italian: of Pozzuoli

Example Sentences

In 1775 he discovered in the Velay a rich deposit of pozzuolana, which in due course was worked by the government.

From Project Gutenberg

An artificial product which serves perfectly as a pozzuolana is granulated blast-furnace slag.

From Project Gutenberg