The Collaborative International Dictionary of English v.0.48:

Crayon \Cray"on\ (kr?"?n), n. [F., a crayon, a lead pencil
   (crayon Cont['e] Cont['e]'s pencil, i. e., one made a black
   compound invented by Cont['e]), fr. craie chalk, L. creta;
   said to be, properly, Cretan earth, fr. Creta the island
   Crete. Cf. Cretaceous.]
   1. An implement for drawing, made of clay and plumbago, or of
      some preparation of chalk, usually sold in small prisms or
      cylinders.
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            Let no day pass over you . . . without giving some
            strokes of the pencil or the crayon.  --Dryden.
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   Note: The black crayon gives a deeper black than the lead
         pencil. This and the colored crayons are often called
         chalks. The red crayon is also called sanguine. See
         Chalk, and Sanguine.
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   2. A crayon drawing.
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   3. (Electricity) A pencil of carbon used in producing
      electric light.
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   Crayon board, cardboard with a surface prepared for crayon
      drawing.

   Crayon drawing, the act or art of drawing with crayons; a
      drawing made with crayons.
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