Glossary

Anthropometry
Use of human body measurements to obtain information about nutritional status.

Body mass index (BMI)
A ratio of weight for height often used to estimate body fat. It is obtained by dividing the weight (in kilograms) by the square of the height (in meters). BMI is not appropriate for assessment of growing children, frail and sedentary elderly individuals, or women who are pregnant or breastfeeding.

Dietary energy deficit
The difference between the average daily dietary energy intake of an undernourished population and its average minimum energy requirement.

Dietary energy intake
The energy content of food consumed.

Dietary energy requirement
The amount of dietary energy required by an individual to maintain body functions, health and normal activity.

Dietary energy supply
Food available for human consumption, expressed in kilocalories per person per day (kcal/person/day). At country level, it is calculated as the food remaining for human use after deduction of all non-food consumption (exports, animal feed, industrial use, seed and wastage).

Degree of food deprivation
A measure of the overall food insecurity situation in a country, based on a classification system that combines prevalence of undernourishment, i.e. proportion of the total population suffering from dietary energy deficit, and depth of undernourishment, i.e. magnitude of the dietary energy deficit of the undernourished population.

Food insecurity
A situation that exists when people lack secure access to sufficient amounts of safe and nutritious food for normal growth and development and an active and healthy life. It may be caused by the unavailability of food, insufficient purchasing power, inappropriate distribution, or inadequate use of food at the household level. Food insecurity, poor conditions of health and sanitation, and inappropriate care and feeding practices are the major causes of poor nutritional status. Food insecurity may be chronic, seasonal or transitory.

Food security
A situation that exists when all people, at all times, have physical, social and economic access to sufficient, safe and nutritious food that meets their dietary needs and food preferences for an active and healthy life.

Kilocalorie (kcal)
A unit of measurement of energy. One kilocalorie equals 1 000 calories. In the International System of Units (ISU), the universal unit of energy is the joule (J). One kilocalorie = 4.184 kilojoules (kJ).

Macronutrients
In this case, the proteins, carbohydrates and fats that are required by the body in large amounts and, available to be used for energy. They are measured in grams.

Malnutrition
An abnormal physiological condition caused by deficiencies, excesses or imbalances in energy, protein and/or other nutrients.

Micronutrients
The vitamins, minerals and certain other substances that are required by the body in small amounts. These are measured in milligrams or micrograms.

Minimum dietary energy requirement
In a specified age/sex category, the amount of dietary energy per person that is considered adequate to meet the energy needs for light activity and good health. For an entire population, the minimum energy requirement is the weighted average of the minimum energy requirements of the different age/sex groups in the population. It is expressed as kilocalories per person per day.

Nutritional status
The physiological state of an individual that results from the relationship between nutrient intake and requirements and from the body 's ability to digest, absorb and use these nutrients.

Overnourishment
Food intake that is in excess of dietary energy requirements continuously.

Overweight and obesity
Body weight that is above normal as a result of an excessive accumulation of fat. It is usually a manifestation of overnourishment. Overweight is defined here as BMI >25-30 and obesity as BMI >30.

Stunting
Low height for age, reflecting a sustained past episode or episodes of undernutrition.

Undernourishment
Food intake that is insufficient to meet dietary energy requirements continuously.

Undernutrition
The result of undernourishment, poor absorption and/or poor biological use of nutrients consumed.

Underweight
Low weight for age in children, and BMI <18.5 in adults, reflecting a current condition resulting from inadequate food intake, past episodes of undernutrition or poor health conditions.

Vulnerability
The presence of factors that place people at risk of becoming food insecure or malnourished, including those factors that affect their ability to cope.

Vulnerable group
A group of people with common characteristics, a high proportion of whom are food-insecure or at risk of becoming food-insecure.

Wasting
Low weight for height, generally the result of weight loss associated with a recent period of starvation or disease.