Definition of portland cement
: a hydraulic cement made by finely pulverizing the clinker produced by calcining to incipient fusion a mixture of clay and limestone or similar materials
Origin and Etymology of portland cement
Isle of Portland, England; from its resemblance to a limestone found there
First Known Use: 1824See Words from the same year
Seen and Heard
What made you want to look up portland cement? Please tell us where you read or heard it (including the quote, if possible).