| 单词 | pozzuolana | 
| 释义 | Word Frequency pozzuolana(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 Pozzuoli | 
	
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