The Collaborative International Dictionary of English v.0.48:

Scall \Scall\, n. [Icel. skalli a bald head. Cf. Scald, a.]
   A scurf or scabby disease, especially of the scalp.
   [1913 Webster]

         It is a dry scall, even a leprosy upon the head. --Lev.
                                                  xiii. 30.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Scall \Scall\, a.
   Scabby; scurfy. [Obs.] --Shak.
   [1913 Webster]