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Definitions of chalk
  1. noun
    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
  2. 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
  3. noun
    a pure flat white with little reflectance
    type of:
  4. noun
    a soft whitish calcite
    type of:
  5. verb
    write, draw, or trace with chalk
    type of:
Explanation of chalk
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