The Collaborative International Dictionary of English v.0.48:

Crisp \Crisp\, v. t. [imp. & p. p. Crisped (kr?spt); p. pr. &
   vb. n. Crisping.] [L. crispare, fr. crispus. See Crisp.
   a. ]
   1. To curl; to form into ringlets, as hair, or the nap of
      cloth; to interweave, as the branches of trees.
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   2. To cause to undulate irregularly, as crape or water; to
      wrinkle; to cause to ripple. Cf. Crimp.
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            The lover with the myrtle sprays
            Adorns his crisped tresses.           --Drayton.
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            Along the crisped shades and bowers.  --Milton.
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            The crisped brooks,
            Rolling on orient pearl and sands of gold. --Milton.
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   3. To make crisp or brittle, as in cooking.
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   Crisping iron, an instrument by which hair or any textile
      fabric is crisped.

   Crisping pin, the simplest form of crisping iron. --Is.
      iii. 22.
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