ˈōsəˌzōn, ˈäs- noun
( -s )
Etymology: International Scientific Vocabulary -ose (II) + az- + -one; probably originally formed as German osazon
: any of a class of basic compounds that contain two adjacent hydrazone groupings and are made from an alpha-diketone and hydrazine, an alkyl- or aryl-hydrazine, or from an alpha-hydroxy aldehyde or ketone (as glucose or benzoin) and an aryl-hydrazine ; especially : phenylosazone