body mass index
(缩略词：BMI)
noun
(pl. body mass indices)
- an approximate measure of whether someone is over-or underweight, calculated by dividing their weight in kilograms by the square of their height in metres体重指数（确定体重是超重抑重量不足的大致衡量标准, 其法为将体重公斤数除身高米数的平方）。