Obesity is determined by measuring both the height and weight of the adolescent. An adolescent is considered overweight if he or she has a BMI more than the 85th percentile but less than the 95th percentile for his or her weight.
Terminology is the language used to describe a specific thing, or the language used within a specific field. Special language used by scientists is an example of science terminology. YourDictionary definition and usage example.
In modern usage, a definition is something, typically expressed in words, that attaches a meaning to a word or group of words. The word or group of words that is to be defined is called the definiendum, and the word, group of words, or action that defines it is called the definiens.