Definition of pozzolana in English:

pozzolana

Line breaks: poz¦zo|lana
Pronunciation: /ˌpɒtsəˈlɑːnə
 
/

noun

[mass noun]
A type of volcanic ash used for mortar or for cement that sets under water.
More example sentences
  • The ashes have been potential pozzolanic materials suitable for use in lime - pozzolana mixes and for Portland cements replacement.
  • It included seawater, lime and sand (pozzolana) and chunks of volcanic rock from the Bay of Naples - the same source for material used in ancient construction efforts at Caesarea and elsewhere in the region.
  • The Romans invented concrete, mixed from pozzolana, a volcanic ash mined on the slopes of Mount Vesuvius, which forms a natural cement when combined with lime.

Origin

early 18th century: from Italian, from pozz(u)olana '(earth) of Pozzuoli', a town near Naples.

Definition of pozzolana in:

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Word of the day abjure
Pronunciation: əbˈdʒʊə
verb
solemnly renounce (a belief, cause, or claim)