pku test pku • placability · · · Info · Definitions · Characters · · pku test · · Text Common · · Latin · · Scripts 8 · · Length 2 · · Syllables Definitions · · · (noun) a test of newborn infants for phenylketonuria. Synonyms: PKU test. · · Noun Definition 1 Characters · · space U+0020 e latin small letter e U+0065 k latin small letter k U+006B p latin small letter p U+0070 s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075