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Portland cement
noun
Definitions
Noun
- 1 A finely-ground powder made by heating and pulverizing limestone and clay. countable, uncountable
"Ordinary Portland Cement (OPC) is the world's most common form of cement. The blue plaque dedicated to inventor Joseph Aspdin describes OPC as "one of mankind's most important manufactured materials"."
- 2 Alternative letter-case form of Portland cement. alt-of, countable, uncountable
- 3 a cement that hardens under water; made by heating limestone and clay in a kiln and pulverizing the result wordnet
Etymology
From its resemblance to limestone from Portland in Dorset.
See also for "portland cement"
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