The Collaborative International Dictionary of English v.0.48:

Camerate \Cam"er*ate\, v. i. [imp. & p. p. Camerated; p. pr. &
   vb. n. Camerzting.] [L. cameratus, p. p. of camerare. See
   Camber.]
   1. To build in the form of a vault; to arch over.
      [1913 Webster]

   2. To divide into chambers.
      [1913 Webster]