chalk

chalk
SYN: calcium carbonate. [L. calx]
- French c. SYN: talc.
- prepared c. purified native calcium carbonate, usually molded into cones; used as a mild astringent and antacid.

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chalk 'chȯk n a soft white, gray, or buff limestone composed chiefly of the shells of foraminifers and sometimes used medicinally as a source of calcium carbonate called also creta see PRECIPITATED CHALK, PREPARED CHALK
chalky 'chȯ-kē adj

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(chawk) [L. calx] 1. a natural calcium carbonate; the amorphous remains of minute marine organisms deposited on the sea bottom and decomposed by the action of acids and heat. Used as a polishing agent in dentistry and frequently as an ingredient in dentifrices. 2. any of various other substances physically resembling calcium carbonate.

Medical dictionary. 2011.

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Look at other dictionaries:

  • chalk — chalk·er; …   English syllables

  • Chalk — (ch[add]k), n. [AS. cealc lime, from L. 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… …   The Collaborative International Dictionary of English

  • chalk — [chôk] n. [ME < OE cealc < L calx, lime, limestone: see CALCIUM] 1. a white, gray, or yellowish limestone that is soft, porous, and easily pulverized, composed almost entirely of calcite from minute sea shells 2. any substance like chalk in …   English World dictionary

  • Chalk — Chalk, v. t. [imp. & p. p. {Chalked}; p. pr. & vb. n. {Chalking}.] 1. To rub or mark with chalk. [1913 Webster] 2. To manure with chalk, as land. Morimer. [1913 Webster] 3. To make white, as with chalk; to make pale; to bleach. Tennyson. [1913… …   The Collaborative International Dictionary of English

  • chalk — ► NOUN 1) a white soft limestone (calcium carbonate) formed from the skeletal remains of sea creatures. 2) a similar substance (calcium sulphate), made into sticks and used for drawing or writing. ► VERB 1) draw or write with chalk. 2) Brit.… …   English terms dictionary

  • chalk|y — «CH kee», adjective, chalk|i|er, chalk|i|est. 1. of chalk; containing chalk: »The blackboard eraser was full of chalky dust. 2. like chalk; white as chalk: »The clown s …   Useful english dictionary

  • chalk — [tʆɔːk ǁ tʆɒːk] verb chalk up something phrasal verb [transitive] to succeed in getting something or reaching a total: • The big oil companies continued to chalk up huge profits …   Financial and business terms

  • Chalk — (engl. für Kreide) ist der Name eines kommerziellen Jugendmagazins, das in Österreich an den meisten höheren Schulen gratis aufliegt. Das 52seitige Heft erreicht ca. 105.000 Schüler, neben aktuellen CD , Buch , PC , TV Kritiken und diversen… …   Deutsch Wikipedia

  • chalk... — chalk..., Chalk... [ç...] vgl. ↑chalko..., Chalko …   Das große Fremdwörterbuch

  • chalk up to — chalk (something) up to (something else) to say that something is caused by something else. She doesn t even bother to say thank you, but I just chalk it up to bad manners and try not to let it bother me …   New idioms dictionary

  • chalk up — (something) to record something special. Many banks chalked up large profits from their loans to internet companies. Etymology: based on the idea of keeping a record on a chalk board …   New idioms dictionary

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