alkapton Alkaphrah • alkaptonuria · · · Info · Definitions · Synonyms · Characters · · alkapton · · Text Latin · · Script 8 · · Length Definitions · · · (noun) an acid formed as an intermediate product of the metabolism of tyrosine and phenylalanine. Synonyms: alcapton, homogentisic acid. · · Noun Definition 1 Synonyms · · · alcapton · · Synonym 1 homogentisic acid · · Synonym 2 Characters · · a latin small letter a U+0061 k latin small letter k U+006B l latin small letter l U+006C n latin small letter n U+006E o latin small letter o U+006F p latin small letter p U+0070 t latin small letter t U+0074