Body mass index,or BMI, is a measure of a person's weight in relation to height.

VOA: special.2011.02.15

The World Health Organization defines obesity as a body mass index of thirty or more.

VOA: special.2011.02.15

While there is advice aplenty on how to lose pounds or kilograms, a new study focuses on middle aged and older women who maintain normal body weight, or BMI (Body Mass Index) and do not diet.

VOA: standard.2010.03.30