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[hahy-druh-juh-neyt, hahy-droj-uh-] /ˈhaɪ drə dʒəˌneɪt, haɪˈdrɒdʒ ə-/
verb (used with object), hydrogenated, hydrogenating.
to combine or treat with hydrogen, especially to add hydrogen to the molecule of (an unsaturated organic compound).
Also, hydrogenize.
Origin of hydrogenate
1800-10; hydrogen + -ate1
Related forms
hydrogenation, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for hydrogenate
  • If the oleic fatty acid is increased in soybean oil, stability is increased and the need to hydrogenate the oil is reduced.
  • Manufacturers partially hydrogenate these fatty acids to make them solids at room temperature.
  • Attempts to use a second catalyst to simultaneously hydrogenate the aldehyde as it was formed had limited success.
  • The purpose of the hydrogen is to hydrogenate unsaturated compounds to prevent polymerization.
  • Hydrolysis-fermentation to carboxylates-hydrogenate to alcohols.
British Dictionary definitions for hydrogenate


/ˈhaɪdrədʒɪˌneɪt; haɪˈdrɒdʒɪˌneɪt/
to undergo or cause to undergo a reaction with hydrogen: to hydrogenate ethylene
Derived Forms
hydrogenation, hydrogenization, hydrogenisation, noun
hydrogenator, noun
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
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Word Origin and History for hydrogenate

1809, from hydrogen + -ate (2). Related: Hydrogenated; hydrogenation.

Online Etymology Dictionary, © 2010 Douglas Harper
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hydrogenate in Science
  (hī'drə-jə-nāt', hī-drŏj'ə-nāt')   
  1. To treat or combine chemically an unsaturated compound with hydrogen. Liquid vegetable oils are often hydrogenated to turn them into solids.

  2. To turn coal into oil by combining its carbon with hydrogen to form hydrocarbons.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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