chloral hydrate

chloral

[klawr-uhl, klohr-]
noun
1.
Also called trichloroacetaldehyde, trichloroacetic acid aldehyde. a colorless, oily liquid, C 2 Cl 3 HO, having a pungent odor, usually derived by the chlorination of ethyl alcohol or of acetaldehyde and combining with water to form chloral hydrate.
2.
Also called chloral hydrate. Pharmacology. a white, crystalline solid, C 2 H 3 Cl 3 O 2 , formed by combining liquid chloral with water: used as a hypnotic.

Origin:
1825–35; chlor-2 + -al3

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Collins
World English Dictionary
chloral (ˈklɔːrəl)
 
n
1.  a colourless oily liquid with a pungent odour, made from chlorine and acetaldehyde and used in preparing chloral hydrate and DDT; trichloroacetaldehyde
2.  short for chloral hydrate

chloral hydrate
 
n
a colourless crystalline soluble solid produced by the reaction of chloral with water and used as a sedative and hypnotic; 2,2,2-trichloro-1,1-ethanediol. Formula: CCl3CH(OH)2

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

chloral hydrate chlo·ral hydrate (klôr'əl)
n.
A crystalline compound used medicinally 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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Encyclopedia Britannica
Encyclopedia

chloral hydrate

the first synthetically produced sedative-hypnotic drug, commonly used in the late 19th century to treat insomnia and still occasionally used to reduce anxiety or produce sleep before surgery. Chloral hydrate acts as a depressant on the central nervous system, with sedative effects similar to those of barbiturates.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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