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functional disease

American  

noun

Pathology.
  1. a disease in which there is an abnormal change in the function of an organ, but no structural alteration in the tissues involved (organic disease ).


functional disease British  

noun

  1. a disease in which there is no observable change in the structure of an organ or part Compare organic disease

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of functional disease

First recorded in 1870–75

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Epilepsy, ep′i-lep-si, n. a chronic functional disease of the nervous system, manifested by recurring attacks of sudden insensibility or impairment of consciousness, commonly accompanied by peculiar convulsive seizures.—n.

From Project Gutenberg

By organic disease is meant one that causes serious, perhaps permanent deterioration of the tissues of the body; by functional disease is meant one due to a perverted action of approximately normal organs.

From Project Gutenberg

Believing, then, as I do, that most Christian Science cures are genuine—genuine cures of functional disease—the question arises whether the special methods of mental healing employed by Christian Scientists differ from other methods of mental healing, such as are employed by the best neurologists, both in this country and in Europe.

From Project Gutenberg

On the other hand, a structural or functional disease of the brain may prevent that organ from taking cognizance of the sensations of the stomach, when the system actually requires nourishment.

From Project Gutenberg

Pruritus is a functional disease of the skin, the sole symptom of which is itching, there being no structural change.

From Project Gutenberg