Portland cement
or portland cement
noun
a type of hydraulic cement usually made by burning a mixture of limestone and clay in a kiln.
Origin of Portland cement
First recorded in 1815–25; named after the Isle of
Portland, Dorsetshire, England
British Dictionary definitions for portland cement
Portland cement
noun
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 Origin for Portland cement
C19: named after the Isle of
Portland, because its colour resembles that of the stone quarried there