primary amenorrhea primary • primary atypical pneumonia · · · Info · Definitions · Characters · · primary amenorrhea · · Text Common · · Latin · · Scripts 18 · · Length 7 · · Syllables Definitions · · · (noun) delay of menarche beyond age 18. Synonyms: primary amenorrhea. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 e latin small letter e U+0065 h latin small letter h U+0068 i latin small letter i U+0069 m latin small letter m U+006D n latin small letter n U+006E o latin small letter o U+006F p latin small letter p U+0070 r latin small letter r U+0072 y latin small letter y U+0079