| 单词 | pozzuolana |
| 释义 | pozzuolana in British English (ˌpɒtswəˈlɑːnə) or pozzolana (ˌpɒtsəˈlɑːnə) noun German name: puzzolana1. a type of porous volcanic ash used in making hydraulic cements 2. any of various artificial substitutes for this ash used in cements Word origin C18: from Italian: of Pozzuolipozzuolana in American English (ˌpɑtswoʊˈlɑnə) noun Also ˈpozzoˌlan (ˈpɑtsəˌlɑn), ˌpozzoˈlana (ˌpɑtsoʊˈlɑnə) 1. a volcanic rock, powdered and used in making a hydraulic cement 2. a siliceous or siliceous-and-aluminous material that will, in finely divided form and in the presence of moisture, react with calcium hydroxide to form a cement Derived forms pozzuolanic (ˌpozzuoˈlanic) adjective Word origin It < L puteolana (pulvie), (powder of) Puteoli (now It Pozzuoli), site of the quarries |
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