[ hahy-druh-juh-neyt, hahy-droj-uh- ]

verb (used with object),hy·dro·gen·at·ed, hy·dro·gen·at·ing.
  1. to combine or treat with hydrogen, especially to add hydrogen to the molecule of (an unsaturated organic compound).

Origin of hydrogenate

First recorded in 1800–10; hydrogen + -ate1

Other words from hydrogenate

  • hy·dro·gen·a·tion, noun

Words Nearby hydrogenate

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

British Dictionary definitions for hydrogenate


hydrogenize or hydrogenise

/ (ˈhaɪdrədʒɪˌneɪt, haɪˈdrɒdʒɪˌneɪt) /

  1. to undergo or cause to undergo a reaction with hydrogen: to hydrogenate ethylene

Derived forms of hydrogenate

  • hydrogenation, hydrogenization or 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

Scientific definitions for hydrogenate


[ drə-jə-nāt′, hī-drŏjə-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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.