chalk

1. n. A soft, earthy substance, of a white, grayish, or yellowish white color, consisting of calcium carbonate, and having the same composition as common limestone. Source: opted

2. 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. Source: opted

3. v. t. To rub or mark with chalk. Source: opted

4. v. t. To manure with chalk, as land. Source: opted

5. v. t. To make white, as with chalk; to make pale; to bleach. Source: opted

6. n. a soft whitish calcite Source: wordnet

7. n. a pure flat white with little reflectance Source: wordnet

8. n. an amphetamine derivative (trade name Methedrine) used in the form of a crystalline hydrochloride; used as a stimulant to the nervous system and as an appetite suppressant Source: wordnet

9. n. 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 Source: wordnet

10. v. write, draw, or trace with chalk Source: wordnet

11. A soft, earthy substance, of a white, grayish, or yellowishwhite color, consisting of calcium carbonate, and having the samecomposition as common limestone. Source: adambom

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