a porous variety of volcanic tuff or ash used in making hydraulic cement.
- Also poz·zo·lan [pot-suh-luhn], /ˈpɒt sə lən/, poz·zuo·la·na [pot-swuh-lah-nuh; Italian pawt-tswaw-lah-nah], /ˌpɒt swəˈlɑ nə; Italian ˌpɔt tswɔˈlɑ nɑ/, puzzolan, puzzolana.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use pozzolana in a sentence
This shows the utter unfitness of the pozzolana beds in which the arenaria are excavated for the construction of the Catacombs.The Catacombs of Rome | William Henry Withrow
The celebrated pozzolana sand makes the best mortar in the world, from its gritty nature.Museum of Antiquity | L. W. Yaggy
Not only the walls but the vaults were built in this pozzolana concrete, and formed one solid mass.