what-code
nounUK /ˈwɒt kəʊd/
US /ˈwʌt koʊd/
A special set of letters or numbers that tells you what something is.
The what-code on the box showed it was a toy.
OTHER MEANINGS
2. A secret way of writing that hides what a message means.
The spies used a what-code so nobody could read their notes.
3. A short name used in a computer to stand for something.
The programmer typed the what-code to open the right file.
4. A set of rules that tells people how to do something.
The game had a what-code for how to play fairly.