[1] : The Collaborative International Dictionary of English v.0.48

lactonic \lacton"ic\, a. from lactone. chem.
   of, pertaining to, or derived from, a lactone.
   1913 webster
see also:
lactone 

[2] : The Collaborative International Dictionary of English v.0.48

lactonic \lacton"ic\, a. from lactose. chem.
   pertaining to, or designating, an acid obtained by the
   oxidation of milk sugar lactose.
   1913 webster
see also:
lactose 

Lactonic >> L Words
Lactonic, definition of term: Lactonic
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