# body mass index

Also found in: Dictionary, Thesaurus, Legal, Financial, Acronyms, Encyclopedia, Wikipedia.

Related to body mass index: Ideal Weight

## index

(pl.*indexes, in´dices*) (

*L.*)

**1.**the numerical ratio of measurement of any part in comparison with a fixed standard.

**2.**forefinger.

**Barthel index**an objective, standardized tool for measuring functional status. The individual is scored in a number of areas depending upon independence of performance. Total scores range from 0 (complete dependence) to 100 (complete independence).

**bleeding index**any of various methods of assessing bleeding in the gingival sulcus before or after treatment.

**body mass index**(BMI) the weight in kilograms divided by the square of the height in meters, a measure of body fat that gives an indication of nutritional status.

**cardiac index**cardiac output corrected for body size.

**cephalic index**100 times the maximum breadth of the skull divided by its maximum length.

**citation index**an index listing all publications appearing in a set of source publications (e.g., articles in a defined group of journals) that cite a given publication in their bibliographies.

**Colour index**a publication of the Society of Dyers and Colourists and the American Association of Textile Chemists and Colorists containing an extensive list of dyes and dye intermediates. Each chemically distinct compound is identified by a specific number, the C.I. number, avoiding the confusion of trivial names used for dyes in the dye industry.

**erythrocyte indices**the mean corpuscular volume, mean corpuscular hemoglobin, and mean corpuscular hemoglobin concentration. These are all useful for evaluating anemias because they provide information on the size of the erythrocytes and the concentration of hemoglobin. Called also red cell or red blood cell indices.

**glycemic index**a ranking of foods based on the response of postprandial blood sugar levels as compared with a reference food, usually either white bread or glucose. See table.

**left ventricular stroke work index**(LVSWI) an index of the amount of work performed by the heart.

**leukopenic index**a fall of 1000 or more in the total leukocyte count within 1.5 hours after ingestion of a given food; it indicates allergic hypersensitivity to that food.

**index Medicus**a monthly publication of the national library of medicine in which the world's leading biomedical literature is indexed by author and subject.

**opsonic index**a measure of opsonic activity determined by the ratio of the number of microorganisms phagocytized by normal leukocytes in the presence of serum from an individual infected by the microorganism, to the number phagocytized in serum from a normal individual.

**phagocytic index**any arbitrary measure of the ability of neutrophils to ingest native or opsonized particles determined by various assays; it reflects either the average number of particles ingested or the rate at which particles are cleared from the blood or culture medium.

**refractive index**the refractive power of a medium compared with that of air (assumed to be 1).

**short increment sensitivity index**(SISI) a hearing test in which randomly spaced, 0.5-second tone bursts are superimposed at 1- to 5-decibel increments in intensity on a carrier tone having the same frequency and an intensity of 20 decibels above the speech recognition threshold.

**therapeutic index**originally, the ratio of the maximum tolerated dose to the minimum curative dose; now defined as the ratio of the median lethal dose (LD

_{50}) to the median effective dose (ED

_{50}). It is used in assessing the safety of a drug.

## bod·y mass in·dex (BMI),

[MIM*606641]an anthropometric measure of body mass, defined as weight in kilograms divided by height in meters squared; a method of determining caloric nutritional status.

## body mass index

*n.*

*Abbr.*

**BMI**

A measurement of the relative percentages of fat and muscle mass in the human body, in which weight in kilograms is divided by height in meters squared and the result used as an index of obesity.

## body mass index (BMI)

a formula for determining obesity. It is calculated by dividing a person's weight in kilograms by the square of the person's height in meters. An adult with a BMI of 25 to 29.9 is considered overweight. A BMI of 30 or greater indicates obesity.

## body mass index

Physiology A calculated value that correlates with body fat, which is used to define obesity; according to the WHO, ↑ risk of various obesity-related conditions occur at BMIs of ≥ 25. See Fat balance.## bod·y mass in·dex

**(BMI)**(bod'ē mas in'deks)

A rough method of assessing weight status; correlates with risk of disease and death due to causes associated with obesity; because it does not distinguish excess adiposity from excess lean body mass. BMI = weight (kg) ÷ height (m

^{2}). Also see Appendices.## body mass index

Abbreviation:**BMI**

An index for estimating obesity. The BMI can be obtained by dividing weight in kilograms by height in meters squared, or according to the following formula: BMI = (Weight/2.205) / (Height/39.37)

Synonym: Quetelet index See: ^{2 }. In adults, a BMI greater than 30 kg/m^{2}indicates obesity; a BMI greater than 40 kg/m^{2}indicates morbid obesity; and a BMI less than 18.5 kg/m^{2}indicates a person is underweight. The lowest overall death rate is found in people with a BMI of 20 to 24.9 kg/m^{2}.*illustration*

See also: index

## body mass index (BMI)

The weight in kilograms divided by a number obtained by taking the height in metres and multiplying it by itself. (Kg/m^{2}). The BMI is a more satisfactory way of determining the risk of obesity than simple weight. The normal range of BMI is 19 to 25. Obesity is defined as a BMI of 27 or over. People with this figure show a significant excess of illness over those in the normal range.

## Body mass index (BMI)

A measurement that has replaced weight as the preferred determinant of obesity. The BMI can be calculated (in English units) as 703.1 times a person's weight in pounds divided by the square of the person's height in inches.

Mentioned in: Insulin Resistance, Weight Loss Drugs

## body mass index

;**BMI**ratio of body weight (in kilograms) and square of height (in metres) (BMI = kg/m

^{2}); 20-25 = normal BMI; BMI <20 = underweight; >30 = obese; >35 = morbid obesity

## body mass index,

*n*obesity-determining formula according to which an individual's weight in kilograms is divided by the square of the individual's height in meters. A BMI of 27 or more indicates obesity.

## bod·y mass in·dex

(bod'ē mas in'deks) [MIM*606641]Anthropometric measure of body mass, defined as weight in kilograms divided by height in meters squared.

## Patient discussion about body mass index

**Q. how can i know my body mass index? how do they calculate it.thank you.** this is bse i have a problem with my weight and the right diet to take.i wana have some tips on that bse its too much for me.new year.

**A.**BMI is a simple method to have an estimation of your body weight. because just measuring weight is not enough because it differentiate between people due to their hight. a 5 footer does not have normal weight as a 6 footer...

here is a link to the WHO site that explains how to calculate it and what the results mean:

http://www.who.int/bmi/index.jsp?introPage=intro_3.html