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pozzolana

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

puzzolana

[poot-suh-lah-nuh; Italian poot-tsaw-lah-nah]
noun
  1. pozzolana.
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Also puz·zo·lan [poot-suh-luh n] /ˈput sə lən/.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for puzzolan

puzzolana

noun
  1. a variant of pozzuolana
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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