Where does “κιτρικό οξύ” come from?

κιτρικό οξύ (Greek) comes from French citrique, from French -ique, from Middle French -ique, from Old French -ique, from Latin -icus, from Proto-Italic *-ikos — forms adjectives with the sense of 'of or pertaining to'.

κιτρικό οξύ (Greek): citric acid