scurf

The heel should be well but gently washed with soap and water, and as much of the scurf detached as is easily removable.

Many who went there covered with scurf returned plump and fair, and scarce like the same people.

But in another passage he calls kermes, not improperly, a scurf or scab of the tree, scabies fruticis.

It was the sole tree of the host clad thus in scurf bearing a semblance of livid metal.