expectedpiece

noun
UK /ɪkˈspektɪd piːs/
US /ɪkˈspektɪd piːs/

A piece that you think will be there.

The last expectedpiece of the puzzle was missing from the box.


OTHER MEANINGS

2. A part of a whole that is assumed to be present by default.

The software treats the header as an expectedpiece of every file.

3. A component whose arrival or presence is planned for in advance.

Each expectedpiece of the shipment was checked off the list.

4. A standard element that people believe should be included.

A warm welcome is an expectedpiece of any good party.