The Collaborative International Dictionary
Lactonic
Lactonic \Lac*ton"ic\, a. [From Lactone.] (Chem.) Of, pertaining to, or derived from, a lactone.
Lactonic
Lactonic \Lac*ton"ic\, a. [From Lactose.] (Chem.) Pertaining to, or designating, an acid obtained by the oxidation of milk sugar (lactose).
Wiktionary
lactonic
a. (context organic chemistry English) Of, relating to, or derived from, lactone.