codekey
nounUK /ˈkəʊd kiː/
US /ˈkoʊd kiː/
A special secret word or number that opens a lock or lets you in.
She typed the codekey into the door and it opened.
OTHER MEANINGS
2. A small tool or chart used to read or write secret messages.
The spy used a codekey to decode the letter.
3. A button or symbol on a keyboard that stands for a special action.
Press the codekey to start the game.
4. A set of letters and numbers that identifies something in a computer system.
Each product has its own codekey in the store's computer.