The Collaborative International Dictionary of English v.0.48:
mepacrine \mepacrine\ n. Quinacrine, a drug once used to treat malaria; Atabrine is a trademark. Syn: quinacrine, Atabrine. [WordNet 1.5]WordNet (r) 3.0 (2006):
mepacrine n 1: a drug (trade name Atabrine) used to treat certain worm infestations and once used to treat malaria [syn: quinacrine, quinacrine hydrochloride, mepacrine, Atabrine]