acetaldehyde acetaldehydase • acetaldehydrase · · · Info · Definitions · Synonyms · Characters · · acetaldehyde · · Text Latin · · Script 12 · · Length Definitions · · · (noun) a colorless volatile water-soluble liquid aldehyde used chiefly in the manufacture of acetic acid and perfumes and drugs. Synonyms: ethanal. · · Noun Definition 1 Synonyms · · · ethanal · · Synonym 1 Characters · · a latin small letter a U+0061 c latin small letter c U+0063 d latin small letter d U+0064 e latin small letter e U+0065 h latin small letter h U+0068 l latin small letter l U+006C t latin small letter t U+0074 y latin small letter y U+0079