transitive verb-·nat·ed, -·nat·ing
to combine with, treat with, or expose to the action of, hydrogen; specif., to produce a saturated fat or trans fat by treating (an unsaturated fat) with hydrogen
transitive verbhy·dro·gen·at·ed, hy·dro·gen·at·ing, hy·dro·gen·ates
To combine with or subject to the action of hydrogen, especially to combine (an unsaturated oil) with hydrogen to produce a solid fat.
(third-person singular simple present hydrogenates, present participle hydrogenating, simple past and past participle hydrogenated)