Source : Webster's Revised Unabridged Dictionary (1913)

Scurf \Scurf\, n. [AS. scurf, sceorf, or from Scand.; cf. Sw.
   skorf, Dan. skurv, Icel. skurfur, D. schurft, G. schorf; all
   akin to AS. scurf, and to AS. sceorfan to scrape, to gnaw, G.
   sch["u]rfen to scrape, and probably also to E. scrape. Cf.
   {Scurvy}.]
   1. Thin dry scales or scabs upon the body; especially, thin
      scales exfoliated from the cuticle, particularly of the
      scalp; dandruff.

   2. Hence, the foul remains of anything adherent.

            The scurf is worn away of each committed crime.
                                                  --Dryden.

   3. Anything like flakes or scales adhering to a surface.

            There stood a hill not far, whose grisly top Belched
            fire and rolling smoke; the rest entire Shone with a
            glossy scurf.                         --Milton.

   4. (Bot.) Minute membranous scales on the surface of some
      leaves, as in the goosefoot. --Gray.

Source : WordNet®

scurf
     n 1: (botany) a covering that resembles scales or bran that
          covers some plant parts
     2: a thin flake of dead epidermis shed from the surface of the
        skin [syn: {scale}, {exfoliation}]