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Noun: BMI
  1. A number reflecting human weight in relationship to height, defined as weight in kilograms divided by the square of the height in meters
    - body mass index
     
  2. A measure of someone's weight in relation to height; to calculate one's BMI, multiply one's weight in pounds by 703 and divide that by the square of one's height in inches; overweight is a BMI greater than 25; obese is a BMI greater than 30
    "His doctor noted that his BMI had increased significantly";
    - body mass index

Type of: index, index number, indicant, indicator

Encyclopedia: BMI