n. a stimulant drug that is chemically related to mescaline and amphetamine and is used illicitly for its euphoric and hallucinogenic effects; it was formerly used in psychotherapy but in 1985 it was declared illegal in the United States
abbr. 二亚甲基双氧苯丙胺（methylene dioxymetham-phetamine）；摇头丸, 快乐丸