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

catbrier \catbrier\ n.
   a very prickly woody vine of eastern u.s. smilax
   rotundifolia growing in tangled masses, having tough round
   stems with shiny leathery leaves and small greenish flowers
   followed by clusters of inedible shiny black berries.

   syn: bullbrier, greenbrier, horsebrier, brier, briar, smilax
        rotundifolia.
        wordnet 1.5
see also:
smilax rotundifolia smilax rotundifolia 

[2] : WordNet (r) 2.0

catbrier
     n : a very prickly woody vine of the eastern united states
         growing in tangled masses having tough round stems with
         shiny leathery leaves and small greenish flowers followed
         by clusters of inedible shiny black berries syn: bullbrier,
          greenbrier, horse brier, horse-brier, brier, briar,
          smilax rotundifolia
see also:
bullbrier greenbrier horse brier horse-brier brier briar 
smilax rotundifolia 

Catbrier >> C Words
Catbrier, definition of term: Catbrier
catbrier_pag1.html