pozzolana

[pot-suh-lah-nuh; Italian pawt-tsaw-lah-nah]

noun

a porous variety of volcanic tuff or ash used in making hydraulic cement.

Also poz·zo·lan

[pot-suh-luh n] /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.

Origin of pozzolana

1905–10; < Italian < Latin puteolāna, feminine of puteolānus of Pozzuoli (< Latin Puteolī literally, little springs); see -an

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Examples from the Web for pozzuolana

Historical Examples of pozzuolana

In 1775 he discovered in the Velay a rich deposit of pozzuolana, which in due course was worked by the government.
Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 2
Various
An artificial product which serves perfectly as a pozzuolana is granulated blast-furnace slag.
Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 6
Various

British Dictionary definitions for pozzuolana

pozzuolana

pozzolana (ˌpɒtsəˈlɑːnə)

noun

a type of porous volcanic ash used in making hydraulic cements

any of various artificial substitutes for this ash used in cements

German name: puzzolana

Word Origin for pozzuolana

C18: from Italian: of Pozzuoli

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012