Bible Dictionaries
Portland Cement
Webster's Dictionary
A cement having the color of the Portland stone of England, made by calcining an artificial mixture of carbonate of lime and clay, or sometimes certain natural limestones or chalky clays. It contains a large proportion of clay, and hardens under water.
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Bibliography Information
Webster, Noah. Entry for 'Portland Cement'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​p/portland-cement.html. 1828.