bath room

bath room (plural bath rooms)

1. (uncommon) Alternative form of bathroom in its various senses.
   • 1864 January 26, J.G. Lindsay, letter to P.P.L. O'Connel, §8:

     Arconum—I found two chairs wanting in the gentlemen's room, and the attached applied to other purposes... the privies and urinaries clean...

• Robotham, Bohr atom