Source : Webster's Revised Unabridged Dictionary (1913)

Ambulator \Am"bu*la`tor\, n.
   1. One who walks about; a walker.

   2. (Zo["o]l.)
      (a) A beetle of the genus {Lamia}.
      (b) A genus of birds, or one of this genus.

   3. An instrument for measuring distances; -- called also
      {perambulator}. --Knight.