The Collaborative International Dictionary of English v.0.48:

Rhabdite \Rhab"dite\, n. [Gr. "ra`bdos a rod.]
   1. (Zool.) A minute smooth rodlike or fusiform structure
      found in the tissues of many Turbellaria.
      [1913 Webster]

   2. (Zool.) One of the hard parts forming the ovipositor of
      insects.
      [1913 Webster]