Source : Webster's Revised Unabridged Dictionary (1913)

Dexter \Dex"ter\, n. [Prob. so named after the original
   breeder.]
   One of a breed of small hardy cattle originating from the
   Kerry breed of Ireland, valuable both for beef and milk. They
   are usually chiefly black, sometimes red, and somewhat
   resemble a small shorthorn in build. Called also {Dexter
   Kerry}.