decarboxylate Syllabification: (de·car·box·yl·ate)Pronunciation: /ˌdēkärˈbäksəˌlāt/Definition of decarboxylate verb [with object] Chemistry eliminate a carboxylic acid group from (an organic compound). [no object] undergo the process of decarboxylation. Derivatives decarboxylationPronunciation: /ˌdēkärˌbäksəˈlāSHən/ noun decarboxylate in other Oxford dictionaries Definition of decarboxylate in the British & World English dictionary