functional

functional is an   Adverb

Definition:

[1] Pertaining to, or connected with, a function or duty; official.

[2] Pertaining to the function of an organ or part, or to the functions in general. 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.

Synonyms: