幼よう児じ死し亡ぼう率りつMeaningsNoun1. infant mortality rateKanji used幼very young児kid死death亡deceased率ratioComposed of幼よう児じyoung child; toddler; child over 1 but not yet of school ageNoun死し亡ぼう率りつdeath rate; mortality rateNoun