[ puh-ral-duh-hahyd ]

nounChemistry, Pharmacology.
  1. a colorless, liquid, cyclic compound, C6H12O3, 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.

Origin of paraldehyde

First recorded in 1855–60; par- + aldehyde

Words Nearby paraldehyde Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use paraldehyde in a sentence

British Dictionary definitions for paraldehyde


/ (pəˈrældɪˌhaɪd) /

  1. a colourless liquid substance that is a cyclic trimer of acetaldehyde: used in making dyestuffs and as a hypnotic and anticonvulsant drug. Formula: (C 2 H 4 O) 3

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012