chalk

  1. a soft whitish calcite
  2. a pure flat white with little reflectance

Chalk

A soft type of limestone which when finely ground can be used to reduce soil acidity

chalk

A soft compact calcite, CaCO3, with varying amounts of silica, quartz, feldspar, or other mineral impurities, generally gray-white or yellow-white and derived chiefly from fossil seashells.
Found on http://www.ucmp.berkeley.edu/glossary/glossary_2.html

Chalk

Chalk is a soft, white type of limestone (a sedimentary rock ). It consists mostly of calcium carbonate (CaCO3) from ancient, microscopic, single-celled marine invertebrate shells. This type of rock is very porous, soft (a hardness of 3 on the Mohs scale), and crumbly. The chalk used to draw with is actually gypsum (calcium sulfate, CaSO4-2H2O)
Found on http://www.enchantedlearning.com/subjects/dinosaurs/glossary/

Chalk

A fine grained, white calcium carbonate composed of coccoliths. Common in the Cretaceous of western Europe. The White Cliffs of Dover are a classic example of chalk cliffs.
Found on http://www.geologyrocks.co.uk/glossary/letter/m

chalk

[n] - a soft whitish calcite 2. [n] - a pure flat white with little reflectance 3. [n] - a piece of chalk (or similar substance) used for writing on blackboards or other surfaces 4. [v] - write, draw, or trace with chalk
Found on http://www.webdictionary.co.uk/definition.php?query=chalk

Chalk

Powder used on hands for secure grip.
Found on http://www.netfit.co.uk/glossary/fitness-glossary-c.htm

Chalk

Not regular children's chalk, this is specially designed to be safe for Scrapbooking and used in similar paper arts.
Found on http://www.scrapdirectory.co.uk/scrapbook-pages-glossary.htm

chalk

Soft limestone (made from gypsum) used in stick form as a drawing medium; mixed with pigment and a binding agent it is an ingredient used to make crayons. Chalk drawings exist from prehistoric times...
Found on http://www.encyclo.co.uk/local/20688

Chalk

a variety of white limestone made from tiny mud-sized particles. The Chalk forms many of the low rounded hills in the south-east of England and was formed during the Cretaceous period
Found on http://www.sedgwickmuseum.org/education/glossary.html

Chalk

White or off-white inorganic material composed of calcium carbonate. Naturally occurring, although also produced industrially throughout the twentieth century.
Found on http://www.tate.org.uk/collections/glossary/definition.jsp?entryId=472

Chalk

Chalk noun [ Anglo-Saxon cealc lime, from Latin calx limestone. See Calz , and Cawk .] 1. (Min.) A soft, earthy substance, of a white, grayish, or yellowish white color, consisting of calcium carbonate, and having the same composition as common limestone. ...
Found on http://www.encyclo.co.uk/webster/C/51

Chalk

Chalk transitive verb [ imperfect & past participle Chalked ; present participle & verbal noun Chalking .] 1. To rub or mark with chalk. 2. To manure with chalk, as land. Morimer. 3. To make white, as wi...
Found on http://www.encyclo.co.uk/webster/C/51

chalk

Synonym: calcium carbonate. ... Origin: L. Calx ... (05 Mar 2000) ...
Found on http://www.mondofacto.com/facts/dictionary?chalk

chalk

noun a piece of calcite or a similar substance, usually in the shape of a crayon, that is used to write or draw on blackboards or other flat surfaces
Found on http://wordnetweb.princeton.edu/perl/webwn?s=chalk

chalk

noun a pure flat white with little reflectance
Found on http://wordnetweb.princeton.edu/perl/webwn?s=chalk

chalk

noun a soft whitish calcite
Found on http://wordnetweb.princeton.edu/perl/webwn?s=chalk

chalk

verb write, draw, or trace with chalk
Found on http://wordnetweb.princeton.edu/perl/webwn?s=chalk

Chalk

• (n.) Finely prepared chalk, used as a drawing implement; also, by extension, a compound, as of clay and black lead, or the like, used in the same manner. See Crayon. • (v. t.) To manure with chalk, as land. • (n.) A soft, earthy substance, of a white, grayish, or yellowish white color, consisting of calcium carbonate, and having th...
Found on http://thinkexist.com/dictionary/meaning/chalk/

chalk

soft, fine-grained, easily pulverized, white-to-grayish variety of limestone. Chalk is composed of the shells of such minute marine organisms as ... [9 related articles]
Found on http://www.britannica.com/eb/a-z/c/51

chalk

Type: Term Pronunciation: chawk Synonyms: calcium carbonate
Found on http://www.medilexicon.com/medicaldictionary.php?t=16448

Chalk

soft, white, porous sedimentary rock, a form of limestone composed of calcite coccolith plates.
Found on http://en.wikipedia.org/wiki/Glossary_of_geology

Chalk

Form of limestone. This sedimentary rock is composed of the shells and skeletons of marine microorganisms.
Found on http://www.physicalgeography.net/physgeoglos/c.html

chalk

Chalk cliffs, Dorset, England A soft, porous form of limestone, composed mainly of calcium carbonate (CaCO3, see calcium) with varying amounts of silica, quartz, feldspar, or other impurities. Chalk is generally gray-white or yellow-white and is derived chiefly from the r...
Found on http://www.daviddarling.info/encyclopedia/C/chalk.html

chalk

chalk, mineral of calcium carbonate, similar in composition to limestone, but softer. It is characteristically a marine formation and sometimes occurs in great thickness; the chief constituents of these chalk deposits are the shells of minute animals called foraminiferans. Chalk has been laid down i...
Found on http://www.infoplease.com/ce6/sci/A0811242.html
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