The Collaborative International Dictionary
Oxybutyric
Oxybutyric \Ox`y*bu*tyr"ic\, a. [Oxy (b) + butyric.] (Chem.) Hydroxybutyric; designating any one of a group of metameric acids ( (C3H6.OH).CO2H).
Wiktionary
oxybutyric
a. (context chemistry English) hydroxybutyric