Bible Dictionaries
Pozzolana

Webster's Dictionary

(n.) Volcanic ashes from Pozzuoli, in Italy, used in the manufacture of a kind of mortar which hardens under water.

Bibliography Information
Webster, Noah. Entry for 'Pozzolana'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​p/pozzolana.html. 1828.