The Collaborative International Dictionary of English v.0.48:

Desiccator \Des"ic*ca`tor\, n.
   1. One who, or that which, desiccates.
      [1913 Webster]

   2. (Chem.) A short glass jar fitted with an air-tight cover,
      and containing some desiccating agent, as sulphuric acid,
      phosphorus pentoxide, or calcium chloride, above which is
      supported on a perforated platform the material to be
      dried, or preserved from moisture.
      [1913 Webster +PJC]

   3. A machine or apparatus for drying fruit, milk, etc.,
      usually by the aid of heat; an evaporator.
      [Webster 1913 Suppl.]