[muh-thak-wuh-lohn, meth-uh-kwey-lohn, -kwol-ohn]
noun Pharmacology.
a nonbarbiturate sedative-hypnotic substance, C 1 6 H 1 4 N 2 O, used to induce sleep: also widely used as an illicit drug.

1960–65; meth(yl) + -a- of uncertain derivation + qu(in)a(zo)l(in)one (see quinazoline, -one) Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
methaqualone (ˌmɛθəˈkweɪləʊn)
a nonbarbituate sedative drug used to treat stress and insomnia. Formula: C16H14N2O

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

hypnotic sedative drug, 1961, from meth(o)- + connecting particle -a- + qu(in)a(zo)lone.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

methaqualone meth·a·qua·lone (měth'ə-kwā'lōn')
A potentially habit-forming drug used as a sedative and hypnotic.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
It produces dose-dependent depressant effects similar to those of the barbiturates and methaqualone.
The dogs were trained to detect cannabis, cocaine, heroin and methaqualone pills.
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