[1] : The Collaborative International Dictionary of English v.0.48

judas \ju"das\, n.
   the disciple who betrayed christ. hence: a treacherous
   person; one who betrays under the semblance of friendship. --
   a. treacherous; betraying.
   1913 webster

   judas hole, a peephole or secret opening for spying.

   judas kiss,
   a a deceitful and treacherous kiss.
   b an act appearing to be an act of friendship, which is in
       fact harmful to the recipient.

   judas tree bot., a leguminous tree of the genus cercis,
      with pretty, rose-colored flowers in clusters along the
      branches. judas is said to have hanged himself on a tree
      of this genus cercis siliquastrum. cercis canadensis
      and cercis occidentalis are the american species, and
      are called also redbud.
      1913 webster
see also:
judas hole judas kiss judas tree cercis cercis siliquastrum cercis canadensis 
cercis occidentalis redbud 

Cercis >> C Words
Cercis, definition of term: Cercis
cercis_pag1.html

Canadensis >> C Words
Canadensis, definition of term: Canadensis
canadensis_pag1.html