Search Result for "inhibitor": 
Wordnet 3.0

NOUN (1)

1. a substance that retards or stops an activity; 



The Collaborative International Dictionary of English v.0.48:

Inhibitor \In*hib"i*tor\, n. [NL.]
   That which causes inhibitory action; esp., an inhibitory
   nerve.
   [1913 Webster]


WordNet (r) 3.0 (2006):

inhibitor
    n 1: a substance that retards or stops an activity [ant:
         activator]