The Collaborative International Dictionary
Functionless
Functionless \Func"tion*less\, a. Destitute of function, or of an appropriate organ. Darwin.
Douglas Harper's Etymology Dictionary
functionless
1836, from function (n.) + -less.
Wiktionary
functionless
a. lacking a function
Usage examples of "functionless".
Spitzka and others demonstrate that in such cases other parts of the brain enlarge to compensate for the atrophic portion which is connected with the functionless nerves.