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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.
1800-10; hydrogen + -ate1
Related forms
hydrogenation, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for hydrogenation
  • Trans fatty acids are unhealthy fats that form when vegetable oil hardens in a process called hydrogenation.
  • Trans fats are created by pumping hydrogen into liquid oil at high temperature, a process called partial hydrogenation.
  • One goal of this project is to optimize the balance between hydrogen consumption and product value for hydrogenation processes.
British Dictionary definitions for hydrogenation


/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
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Word Origin and History for hydrogenation



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

Online Etymology Dictionary, © 2010 Douglas Harper
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hydrogenation in Medicine

hydrogenation hy·dro·gen·a·tion (hī'drə-jə-nā'shən, hī-drŏj'ə-)
The addition of hydrogen to a compound, especially to solidify an unsaturated fat or fatty acid.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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hydrogenation 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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