Search Result for "reinforcer": 
Wordnet 3.0

NOUN (1)

1. (psychology) a stimulus that strengthens or weakens the behavior that produced it;
[syn: reinforcing stimulus, reinforcer, reinforcement]



WordNet (r) 3.0 (2006):

reinforcer
    n 1: (psychology) a stimulus that strengthens or weakens the
         behavior that produced it [syn: reinforcing stimulus,
         reinforcer, reinforcement]