paraldehyde

[puh-ral-duh-hahyd]
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

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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
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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.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Encyclopedia Britannica
Encyclopedia

paraldehyde

colourless liquid of disagreeable taste and pungent odour used in medicine as a sedative-hypnotic drug and in chemistry in the manufacture of organic chemicals. When administered as a medicine, it is largely excreted by the lungs and gives an unpleasant odour to the breath. It is most useful for recalcitrant cases and is an older drug for treatment of acute alcoholic dementia.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
Choral hydrate and paraldehyde are two of the oldest pharmaceutical depressants still in use today.
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