Search Result for "long-acting": 
Wordnet 3.0

ADJECTIVE (1)

1. active over a long period of time; 



The Collaborative International Dictionary of English v.0.48:

long-acting \long-acting\ adj.
   active over a relatively long period of time.
   [WordNet 1.5]


WordNet (r) 3.0 (2006):

long-acting
    adj 1: active over a long period of time