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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 |
a powder made of clay and limestone that becomes hard when water is added. Cement is used as a building material. [1/3 definitions] |
chalk |
a soft, white limestone that comes mostly from tiny sea shells. [1/3 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. |
limestone |
a rock formed mostly from shells and other animal remains. Limestone is used in building and in making cement, lime, and carbon dioxide. |
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. |
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