Definition of "scurf"

scurf¹

/skɜː(ɹ)f/

noun
countable and uncountable, plural scurfs
1. A skin disease.
2. The flakes of skin that fall off as a result of a skin disease.
3. Any crust-like formations on the skin, or in general.
  Quotations
  There ſtood a Hill not far whoſe frieſly top / Belch'd fire and rowling ſmoak; the reſt entire / Shon with a gloſſie ſcurff, undoubted ſign / That in his womb was hid metallic Ore,
  1667, John Milton, “Book I”, in Paradise Lost. […], London: […] [Samuel Simmons], […]; republished as Paradise Lost in Ten Books: […], London: Basil Montagu Pickering […], 1873, lines 670–673
4. (figurative) The foul remains of anything adherent.
  Quotations
  The Scurf is worn away, of each committed Crime
  1697, Virgil, “The Sixth Book of the Æneis”, in John Dryden, transl., The Works of Virgil: Containing His Pastorals, Georgics, and Æneis. […], London: […] Jacob Tonson, […], page 392, line 1011
5. (botany) Minute membranous scales on the surface of some leaves, as in the goosefoot.
6. (obsolete, slang) A low, mean person.

scurf²

/skɜː(ɹ)f/

noun
plural scurfs
1. A grey bull trout (Salvelinus confluentus).