月げっ経けい周しゅう期きMeaningsNoun1. menstrual cycleKanji used月moon経Buddhist scripture周circumference期period (of time)Composed of月げっ経けいmenstruation; menstrual periodNoun周しゅう期きcycle; periodNounExamples1月げっ経けい周しゅう期きは約やく４週しゅう間かんです。My menstrual cycle is about every four weeks.