Portland cement

or portland cement

noun

1. a type of hydraulic cement usually made by burning a mixture of limestone and clay in a kiln.

Portland cement

noun

1. a cement that hardens under water and is made by heating a slurry of clay and crushed chalk or limestone to clinker in a kiln

Word History and Origins

Origin of Portland cement¹

First recorded in 1815–25; named after the Isle of Portland, Dorsetshire, England

Word History and Origins

Origin of Portland cement¹

C19: named after the Isle of Portland , because its colour resembles that of the stone quarried there