Source : Webster's Revised Unabridged Dictionary (1913)

Holstein \Hol"stein\, n. (Zo["o]l.)
   One of a breed of cattle, originally from Schleswig-Holstein,
   valued for the large amount of milk produced by the cows. The
   color is usually black and white in irregular patches.

Source : WordNet®

Holstein
     n : a breed of dairy cattle from northern Holland [syn: {Friesian},
          {Holstein-Friesian}]