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}.

Dexter \Dex"ter\, a. [L.,; akin to Gr. ?, ?, Skr. dakshi?a (cf.
   daksh to be strong, suit); Goth. taihswa, OHG. zeso. Cf.
   {Dexterous}.]
   1. Pertaining to, or situated on, the right hand; right, as
      opposed to sinister, or left.

            On sounding wings a dexter eagle flew. --Pope.

   2. (Her.) On the right-hand side of a shield, i. e., towards
      the right hand of its wearer. To a spectator in front, as
      in a pictorial representation, this would be the left
      side.

   {Dexter chief}, or {Dexter point} (Her.), a point in the
      dexter upper corner of the shield, being in the dexter
      extremity of the chief, as A in the cut.

   {Dexter base}, a point in the dexter lower part or base of
      the shield, as B in the cut.

Source : WordNet®

dexter
     adj : on or starting from the wearer's left