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3 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 port·land cement /ˈportlən(d), ˈpɔrt-/

From: Webster's Revised Unabridged Dictionary (1913)

 Port·land ce·ment A cement having the color of the Portland stone of England, made by calcining an artificial mixture of carbonate of lime and clay, or sometimes certain natural limestones or chalky clays. It contains a large proportion of clay, and hardens under water.
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From: WordNet (r) 2.0

 Portland cement
      n : a cement that hardens under water; made by heating limestone
          and clay in a kiln and pulverizing the result [syn: hydraulic
           cement]