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
pozzolanicplay \ˌpät-sə-ˈla-nik, -ˈlä-\ adjective
Origin and Etymology of pozzolana
First Known Use: 1684
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