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pozzolana

[pot-suh-lah-nuh; Italian pawt-tsaw-lah-nah] /ˌpɒt səˈlɑ nə; Italian ˌpɔt tsɔˈlɑ nɑ/
noun
1.
a porous variety of volcanic tuff or ash used in making hydraulic cement.
Also, pozzolan
[pot-suh-luh n] /ˈpɒt sə lən/ (Show IPA),
pozzuolana
[pot-swuh-lah-nuh; Italian pawt-tswaw-lah-nah] /ˌpɒt swəˈlɑ nə; Italian ˌpɔt tswɔˈlɑ nɑ/ (Show IPA),
puzzolan, puzzolana.
Origin of pozzolana
1905-1910
1905-10; < Italian < Latin puteolāna, feminine of puteolānus of Pozzuoli (< Latin Puteolī literally, little springs); see -an
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Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for pozzuolana

pozzuolana

/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
German name puzzolana
Word Origin
C18: from Italian: of Pozzuoli
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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