Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A drug, C11H15NO2, that is chemically related to amphetamine and mescaline and was formerly used in psychotherapy but is now illegal. It is used illicitly for its ability to induce euphoria, relaxation, and heightened empathy.

from the GNU version of the Collaborative International Dictionary of English.

  • noun acronym Methylenedioxymethamphetamine, a drug designed to have the effects of amphetamines but originally synthesized to avoid the drug laws; it is now a controlled substance. It is informally called ecstasy. It is used by some abusively and illegally without a prescription.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun organic chemistry 3,4-methylenedioxymethamphetamine (the main psychoactive component of the drug ecstasy). But is also available in a crystallised (not always pure) form.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun 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

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[m(ethylene)d(ioxy)m(eth)a(mphetamine).]

Examples

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