Wordnet 3.0
NOUN (1)
1. 
 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; 
[syn: body mass index, BMI]
WordNet (r) 3.0 (2006):
body mass index
    n 1: 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 [syn: body mass index, BMI]