Definition of "hydrogenation" [hy•dro•gen•a•tion]

• The chemical reaction of hydrogen with another substance, especially with an unsaturated organic compound, and usually under the influence of temperature, pressure and catalysts. (noun)

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• "This process is called hydrogenation, because it adds hydrogen atoms to the unsaturated chains."
• "In 1968 William Knowles was the first who was able to demonstrate that chirally catalyzed hydrogenation is feasible."
• "I had lunch with a physicist friend this afternoon and, look, I know very little about physics, but I was totally envious that he gets to spend his days thinking about stuff that not everyone is equipped to think about, and gets to try and solve problems that actually matter to the world (he's doing something with carbon dioxide and turning it into a liquid so that it can be turned into a gas again -- the point being to save the Earth in some way, the details beyond that have escaped me but he used the word hydrogenation a couple of times)."