The Collaborative International Dictionary of English v.0.48:

Scarify \Scar"i*fy\, v. t. [imp. & p. p. Scarified; p. pr. &
   vb. n. Scarifying.] [F. scarifier, L. scarificare,
   scarifare, fr. Gr. ? to scratch up, fr. ? a pointed
   instrument.]
   1. To scratch or cut the skin of; esp. (Med.), to make small
      incisions in, by means of a lancet or scarificator, so as
      to draw blood from the smaller vessels without opening a
      large vein.
      [1913 Webster]

   2. (Agric.) To stir the surface soil of, as a field.
      [1913 Webster] Scariose