Source : Webster's Revised Unabridged Dictionary (1913)

Phaeton \Pha"["e]*ton\, n. [F. pha['e]ton a kind of carriage,
   fr. Pha['e]thon Pha["e]thon, the son of Helios. See
   {Pha["e]thon}.]
   1. A four-wheeled carriage (with or without a top), open, or
      having no side pieces, in front of the seat. It is drawn
      by one or two horses.

   2. See {Pha["e]thon}.

   3. (Zo["o]l.) A handsome American butterfly ({Euphydryas, or
      Melit[ae]a, Pha["e]ton}). The upper side of the wings is
      black, with orange-red spots and marginal crescents, and
      several rows of cream-colored spots; -- called also
      {Baltimore}.

Source : WordNet®

Baltimore
     n : the largest city in Maryland; a major seaport and industrial
         center