Definition of chloral in English:

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Pronunciation: /ˈklɔːral/


[mass noun] Chemistry
1A colourless, viscous liquid made by chlorinating acetaldehyde.
  • Chemical formula: CCl3CHO
Example sentences
  • More preferably, the halogen-containing aldehyde, acetal or hemiacetal is selected from trichloroethanal, 2,2, 2-trichloro - 1-ethoxy ethanol and mixtures thereof.
  • When dissolved in water, trichloroethanal exists primarily in its hydrate form, chloral hydrate (commonly known as ‘knock-out drops’).
  • DDT is produced from the chlorobenzene and trichloroethanal (trichloroacetaldehyde or chloral), which react in the presence of concentrated sulfuric acid.
1.1 short for chloral hydrate.
Example sentences
  • Up to his neck in the reputedly healing waters, Daudet read Montaigne; and in private consumed huge amounts of morphine, chloral and bromide in an attempt to palliate his excruciating pains.
  • He had given up painting in 1878 and existed in the bohemian squalor of his Chelsea mansion, in a state of deep melancholy, sustained by a diet of 180 grains of chloral a day, washed down with whisky.
  • Depressed about losing Lucy, he considers taking chloral to sleep, but decides against it.


Mid 19th century: from French, blend of chlore 'chlorine' and alcool 'alcohol'.

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