fixedfunction
adjectiveUK /fɪkst ˈfʌŋkʃən/
US /fɪkst ˈfʌŋkʃən/
A fixedfunction thing can only do one job and cannot be changed.
The old toaster is a fixedfunction machine that only makes toast.
OTHER MEANINGS
2. In computing, a fixedfunction device is built to perform one specific task and cannot be reprogrammed.
That calculator chip is fixedfunction, so you cannot load new apps onto it.
3. In engineering, a fixedfunction part is designed for one exact role in a machine.
The fixedfunction valve controls water flow and nothing else.
4. In biology, a fixedfunction organ always does the same job in the body.
The heart is a fixedfunction organ that pumps blood.