However, the more generic term of medical disorder is poorly defined, and is not mentioned in the World Health Organization's International Classification of Diseases, nor many common medical textbooks. Attempts have been made to adopt a more universal definition, but there is no widely agreed upon definition.
The term "medical condition" is often used, but its meaning remains vague and is not recognized by the World Health Organization's International Classification of Diseases or most standard medical texts. Various attempts have been made to establish a clear definition, but none has gained widespread acceptance.