Wordnet 3.0
NOUN (1)
1. 
 a plastic containing resins; 
The Collaborative International Dictionary of English v.0.48:
Resinoid \Res"in*oid\ (r?z"?n-oid), a.
   Somewhat like resin.
   [1913 Webster]
WordNet (r) 3.0 (2006):
resinoid
    n 1: a plastic containing resins