What scientific word is used to describe a person who is deficient in one or more particular food groups?

Answer: Malnutrition

Explanation:

Malnutrition can be defined as the condition in which the person is deficient in one or more nutrients.

This condition can lead to many diseases in the body of a person because a nutrient in the body is responsible for many functions.

Being deficient in one or nutrient will affect the body adversely. The body needs all the types of nutrients to work properly.

Hence, the correct term for nutrient deficient people is malnutrition.

Malnourished