'Hydrogenation' definitions:

Definition of 'hydrogenation'

From: WordNet
noun
A chemical process that adds hydrogen atoms to an unsaturated oil; "food producers use hydrogenation to keep fat from becoming rancid"

Definition of 'Hydrogenation'

From: GCIDE
  • Hydrogenation \Hy`dro*gen*a"tion\, n. (Chem.) The act of combining with hydrogen, or the state of being so combined. [1913 Webster]