The Collaborative International Dictionary of English v.0.48:

Freckle \Frec"kle\, v. t. [imp. & p. p. Freckled
   (fr[e^]k"k'ld); p. pr. & vb. n. Freckling
   (fr[e^]k"kl[i^]ng).]
   To sprinkle or mark with freckles or small discolored spots;
   to spot.
   [1913 Webster]