The Collaborative International Dictionary of English v.0.48:

Shorthorn \Short"horn`\, a.
   One of a breed of large, heavy domestic cattle having short
   horns. The breed was developed in England.
   [1913 Webster]

WordNet (r) 3.0 (2006):

shorthorn
    n 1: English breed of short-horned cattle [syn: Durham,
         shorthorn]