body mass index

Definition / meaning of body mass index

A measure that relates body weight to height. BMI is sometimes used to measure total body fat and whether a person is a healthy weight. Excess body fat is linked to an increased risk of some diseases including heart disease and some cancers. Also called BMI.

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Find More About 'body mass index'

Source(s):

The Web site of the National Cancer Institute (http://www.cancer.gov/)

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