The Collaborative International Dictionary of English v.0.48:

Bailer \Bail"er\, n. (Law)
   See Bailor.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Bailer \Bail"er\, n.
   1. One who bails or lades.
      [1913 Webster]

   2. A utensil, as a bucket or cup, used in bailing; a machine
      for bailing water out of a pit.
      [1913 Webster]