concealedcomponent
nounUK /kənˈsiːld kəmˈpəʊnənt/
US /kənˈsiːld kəmˈpoʊnənt/
A part that is hidden so you cannot see it.
The toy car has a concealed component inside that makes it move.
OTHER MEANINGS
2. A piece of a machine that is tucked away out of sight.
The engineer found a concealed component behind the panel.
3. A secret ingredient or part in a mixture.
The recipe has a concealed component that gives it a special taste.
4. A hidden piece of a computer program.
The app has a concealed component that helps it run faster.