The Collaborative International Dictionary of English v.0.48:

Pseudodox \Pseu"do*dox\, a. [Gr. pseydo`doxos; pseydh`s false +
   do`xa an opinion.]
   Not true in opinion or doctrine; false. -- n. A false opinion
   or doctrine. "To maintain the atheistical pseudodox which
   judgeth evil good, and darkness light." --T. Adams.
   [1913 Webster]