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diol

American  
[dahy-awl, -ol] / ˈdaɪ ɔl, -ɒl /

noun

Chemistry.
  1. glycol.


diol British  
/ ˈdaɪɒl /

noun

  1. Also called: glycol.   dihydric alcoholchem any of a class of alcohols that have two hydroxyl groups in each molecule

"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

diol Scientific  
/ dīôl,-ŏl /
  1. An alcohol containing two hydroxyl groups per molecule.


Etymology

Origin of diol

First recorded in 1920–25; di- 1 + -ol 1