The Collaborative International Dictionary of English v.0.48:

Bath \Bath\, n.
   A city in the west of England, resorted to for its hot
   springs, which has given its name to various objects.
   [1913 Webster]

   Bath brick, a preparation of calcareous earth, in the form
      of a brick, used for cleaning knives, polished metal, etc.


   Bath chair, a kind of chair on wheels, as used by invalids
      at Bath. "People walked out, or drove out, or were pushed
      out in their Bath chairs." --Dickens.

   Bath metal, an alloy consisting of four and a half ounces
      of zinc and one pound of copper.

   Bath note, a folded writing paper, 8 1/2 by 14 inches.

   Bath stone, a species of limestone (o["o]lite) found near
      Bath, used for building.
      [1913 Webster]

WordNet (r) 3.0 (2006):

bath chair
    n 1: a wheelchair usually pushed by an attendant, as at a spa