HYDROGENATION
hydrogenation
(noun) a chemical process that adds hydrogen atoms to an unsaturated oil; “food producers use hydrogenation to keep fat from becoming rancid”
Source: WordNet® 3.1
Etymology
Noun
hydrogenation (countable and uncountable, plural hydrogenations)
(chemistry) The chemical reaction of hydrogen with another substance, especially with an unsaturated organic compound, and usually under the influence of temperature, pressure and catalysts.
Source: Wiktionary
Hy`dro*gen*a"tion, n. (Chem.)
Definition: The act of combining with hydrogen, or the state of being so
combined.
Source: Webster’s Unabridged Dictionary 1913 Edition