biformyl
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glyoxal — OHC CHO; the simplest dialdehyde. SYN: oxalaldehyde. * * * gly·ox·al glī äk .sal n a reactive yellow low melting aldehyde CHOCHO made by catalytic oxidation of ethylene glycol * * * gly·ox·al (gli okґsəl) a yellow crystalline compound… … Medical dictionary