Glyoxal :: Glyoxal (n.) A white, amorphous, deliquescent powder, (CO.H)2, obtained by the partial oxidation of glycol. It is a double aldehyde, between glycol and oxalic acid..
Glyoxalic :: Glyoxalic (a.) Pertaining to, or designating, an aldehyde acid, intermediate between glycol and oxalic acid..
Glyoxaline :: Glyoxaline (n.) A white, crystalline, organic base, C3H4N2, produced by the action of ammonia on glyoxal, and forming the origin of a large class of derivatives hence, any one of the series of which glyoxaline is a type; -- called also oxaline..