noun Etymology: Isle of Portland, England; from its resemblance to a limestone found there Date: 1824 a hydraulic cement made by finely pulverizing the clinker produced by calcining to incipient fusion a mixture of clay and limestone or similar materials
PORTLAND CEMENT
Meaning of PORTLAND CEMENT in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012