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| burr3 |
a variety of limestone containing silica, or a millstone made of it; buhrstone. |
| calcite |
a common, soft mineral that occurs in chalk, marble, and limestone and is composed of calcium carbonate. |
| calcium |
a chemical element of the alkaline-earth group that has twenty protons in each nucleus and occurs widely in nature, but only in compounds such as calcite or limestone. (symbol: Ca) [1/2 definitions] |
| calcium carbonate |
a white crystalline compound found in chalk, limestone, marble, shells, and plant ash that is used in the manufacture of cement, paints, plastics, and polishing agents such as toothpaste. |
| cement |
any of various powdered mixtures of clay and limestone that harden into a solid with the addition of water, used as a construction material. [1/6 definitions] |
| chalk |
a soft whitish limestone derived mostly from minute sea shells. [1/6 definitions] |
| chert |
a hard compact rock, esp. of quartz, found in limestone. |
| coquina |
limestone made from an aggregate of coral and seashell fragments, used in construction. [1/2 definitions] |
| dolomite |
a sedimentary rock, similar to limestone, that consists mainly of this mineral. Also known as dolostone. [1/2 definitions] |
| freestone |
any stone soft enough to be cut in any direction without crumbling or splitting, such as limestone or sandstone. [1/3 definitions] |
| Great Pyramid of Giza |
a limestone and granite pyramid, which is the oldest and only remaining of the Seven Wonders of the Ancient World, built circa 2500 B.C.E. as a memorial and tomb for King Khufu, the second king of the fourth Egyptian dynasty. |
| karst |
an area where limestone predominates, characterized by ravines, sinks, and caverns caused by underground streams. |
| limekiln |
a furnace for making lime by heating limestone or shells. |
| limy |
consisting of or containing lime or limestone. [1/2 definitions] |
| marble |
a metamorphic form of limestone, found in many colors and varieties, that can be cut and polished to a hard, shiny surface. [1/7 definitions] |
| oolite |
a variety of limestone made up of small spherical grains. [1/2 definitions] |
| pisolite |
a limestone composed of concretions of these. [1/2 definitions] |
| Portland cement |
(sometimes l.c.) a cement made by heating limestone with clay and hardening under water. |
| quicklime |
calcium oxide, obtained by roasting limestone, shells, and the like; unslaked lime. |
| travertine |
a type of limestone that is found as a deposit at natural hot springs, that looks like pocked marble, and that is used for the facing and floors of buildings, esp. public ones. |
| tripoli |
a porous, lightweight rock consisting of weathered chert or siliceous limestone, used as a polishing powder. |
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