portland cement
/'pɔ:tlənd/
danh từ
- xi măng pooclăng
Định nghĩa tiếng Anh
A cement having the color of the Portland stone of\n England, made by calcining an artificial mixture of carbonate of lime\n and clay, or sometimes certain natural limestones or chalky clays. It\n contains a large proportion of clay, and hardens under water.