[trahy-awl, -ol]
noun Chemistry.
a compound having three hydroxyl groups.

1935–40; tri- + -ol1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
triol (ˈtraɪɒl)
Also called: trihydric alcohol any of a class of alcohols that have three hydroxyl groups per molecule
[from tri- + -ol1]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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American Heritage
Science Dictionary
triol   (trī'ôl', -ōl')  Pronunciation Key 
An alcohol containing three hydroxyl groups (OH) per molecule.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Esters include the edible fats and oils, which are mixed esters between the triol glycerol and fatty acids.
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