poz·​zo·​la·​na | \ ˌpät-sə-ˈlä-nə How to pronounce pozzolana (audio) \
variants: or pozzolan \ ˈpät-​sə-​lən How to pronounce pozzolana (audio) \

Definition of pozzolana

: finely divided siliceous or siliceous and aluminous material that reacts chemically with slaked lime at ordinary temperature and in the presence of moisture to form a strong slow-hardening cement

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Other Words from pozzolana

pozzolanic \ ˌpät-​sə-​ˈla-​nik How to pronounce pozzolana (audio) , -​ˈlä-​ How to pronounce pozzolana (audio) \ adjective

Examples of pozzolana in a Sentence

Recent Examples on the Web And so Giocondo built structures that mixed lime and pozzolana, as Vitruvius instructed. Jonathan Schifman, Popular Mechanics, "The Rock Solid History of Concrete," 12 Oct. 2017 Clay was a major component, and a volcanic ash, today called pozzolana, was also used. Jonathan Schifman, Popular Mechanics, "The Rock Solid History of Concrete," 12 Oct. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'pozzolana.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of pozzolana

1684, in the meaning defined above

History and Etymology for pozzolana

Italian pozzolana

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Time Traveler for pozzolana

Time Traveler

The first known use of pozzolana was in 1684

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Cite this Entry

“Pozzolana.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pozzolana. Accessed 18 Jan. 2021.

More from Merriam-Webster on pozzolana

Britannica.com: Encyclopedia article about pozzolana

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