• (n.) Hydroxy quinoline; a phenol derivative of quinoline, -- called also carbostyril.
(ok″se-kwin´o-lēn) a dicyclic aromatic compound used as a chelating agent; also used in the form of the base or the sulfate salt as a bacteriostatic, fungistatic, antiseptic, and disinfectant.
Ox`y·quin'o·line noun [ Oxy- (b) + quinoline .] (Chemistry) Hydroxy quinoline; a phenol derivative of quinoline, -- called also carbostyril . 
Oxyquinoline (carbostyril) is hydroxy quinoline; a phenol derivative of quinoline.