body mass index is a noun meaning "a measure of someone's weight in relation to height; to calculate one's BMI, multiply one's weight in pounds 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". It carries one recorded sense.
Definitions, synonyms and semantic relations for body mass index come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.