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pozzolana

[pot-suh-lah-nuh; Italian pawt-tsaw-lah-nah]
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noun
  1. a porous variety of volcanic tuff or ash used in making hydraulic cement.
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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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for pozzolana

Historical Examples

  • Not only the walls but the vaults were built in this pozzolana concrete, and formed one solid mass.

    Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 4

    Various

  • 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