functional in Wingdings is ♐︎◆︎■︎♍︎⧫︎♓︎□︎■︎♋︎●︎

Pertaining to the function of an organ or part, or to thefunctions in general. Functional disease (Med.), a disease of whichthe symptoms cannot be referred to any appreciable lesion or changeof structure; the derangement of an organ arising from a cause, oftenunknown, external to itself opposed to organic disease, in which theorgan itself is affected.