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Definition of: pozzuolana
(pot′swə·lä′nə, Ital pōt′tswô·lä′nä) noun
A volcanic ash, first collected at Pozzuoli, used in making hydraulic cement: also made artificially. Also poz′zo·la′na (pot′sə-). [<Ital., from Pozzuoli]
—poz′zuo·lan′ic (-lan′ik) adjective
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