Limestone meaning

līm'stōn'
Made of or with limestone.
adjective
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A common sedimentary rock consisting mostly of calcium carbonate, CaCO3 , used as a building stone and in the manufacture of lime, carbon dioxide, and cement.
noun
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A sedimentary rock consisting mainly of calcium carbonate, often composed of the organic remains of sea animals, as mollusks, corals, etc., and used as building stone, a source of lime, etc.: when crystallized by heat and pressure it becomes marble.
noun
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A sedimentary rock consisting primarily of calcium carbonate, often in the form of the minerals calcite or aragonite, and sometimes with magnesium carbonate in the form of dolomite. Minor amounts of silica, feldspar, pyrite, and clay may also be present. Limestone can occur in many colors but is usually white, gray, or black. It forms either through the accumulation and compaction of fossil shells or other calcium-carbonate based marine organisms, such as coral, or through the chemical precipitation of calcium carbonate out of sea water.
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(mineralogy) An abundant rock of marine and fresh-water sediments; primarily composed of calcite (CaCO₃); it occurs in a variety of forms, both crystalline and amorphous.
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