par aldehyde

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noun Chemistry, Pharmacology.

a colorless, liquid, cyclic compound, C ₆ H ₁ ₂ O ₃ , having a disagreeable taste but an agreeable odor, produced by the polymerization of acetaldehyde with sulfuric acid: used chiefly in the manufacture of organic chemicals and in medicine as a sedative and hypnotic.

Also called paracetaldehyde.

Origin:
1855–60; par- + aldehyde

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Collins

World English Dictionary

paraldehyde (pəˈrældɪˌhaɪd)

—n
	a colourless liquid substance that is a cyclic trimer of acetaldehyde: used in making dyestuffs and as a hypnotic and anticonvulsant drug. Formula: (C₂H₄O)₃

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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00:10

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American Heritage

Medical Dictionary

paraldehyde par·al·de·hyde (pə-rāl'də-hīd')
n.
A potent hypnotic and sedative suitable for oral, rectal, intravenous, and intramuscular administration. Also called paracetaldehyde.

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