DICT.TW Dictionary Taiwan

 Func·tion·al a.
 1. Pertaining to, or connected with, a function or duty; official.
 2. Pathology, Physiol. Pertaining to the function of an organ or part, or to the functions in general; involving or affecting function rather than physiology; as, functional deafness; a functional disease.  See functional disease, below. [wns=2]
 Functional disease Med., a disease of which the symptoms cannot be referred to any appreciable lesion or change of structure; the derangement of an organ arising from a cause, often unknown, external to itself opposed to organic disease, in which the organ itself is affected.
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