pozzolana/ˌpɒts(w)əˈlɑːnə/EtymologyBorrowed from Italian pozz(u)olana, earth of Pozzuoli, a town near Naples, itself from Latin Puteoli, ultimately from the verb puteō (“stink”).nounA type of volcanic ash used for mortar or for cement which sets under water.“Finally the street is strewn with pozzolana to prevent the horses from slipping on the smooth paving.”