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单词 chloral
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WordReference Random House Unabridged Dictionary of American English © 2024
chlo•ral  (klôr′əl, klōr′-),USA pronunciation n. 
  1. ChemistryAlso called trichloroacetaldehyde, trichloroacetic acid aldehyde. a colorless, oily liquid, C2Cl3HO, 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 chlo′ral hy′drate. [Pharm.]a white, crystalline solid, C2H3Cl3O2, formed by combining liquid chloral with water: used as a hypnotic.
  • chlor-2 + -al3 1825–35

Collins Concise English Dictionary © HarperCollins Publishers::
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
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