婴儿死亡率 yīng'érsǐwánglǜ infant mortality rate Origin Definitions Defs Strokes Stroke Words Sentences Sents 婴儿 嬰兒 yīng'ér noun baby infant; baby; specifically a child under one year of age死亡率 sǐwánglǜ noun mortality rate The ratio of deaths in a given population over a specific period of time, typically one year, expressed as a rate per thousand people