|a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.|
|an extraordinary or unusual thing, person, or event; an exceptional example or instance.|
|1.||of, involving, or containing a function or functions|
|2.||practical rather than decorative; utilitarian: functional architecture|
|3.||capable of functioning; working|
|4.||med affecting a function of an organ without structural change|
|a. relating to the purpose or context of a behaviour|
|b. Compare organic psychosis denoting a psychosis such as schizophrenia assumed not to have a direct organic cause, like deterioration or poisoning of the brain|
|6.||maths a function whose domain is a set of functions and whose range is a set of functions or a set of numbers|
functional func·tion·al (fŭngk'shə-nəl)
Of or relating to a function.
Affecting the physiological function but not the structure.