lettercode
nounUK /ˈlɛtə kəʊd/
US /ˈlɛtər koʊd/
A lettercode is a secret way of writing where letters stand for other letters or words.
The spy used a lettercode to hide the message from his friends.
OTHER MEANINGS
2. A set of letters used as a short label for something.
Each classroom had a lettercode, like A1 or B2.
3. A pattern of letters that gives a computer or machine instructions.
The robot followed a lettercode to move forward.
4. A way to write words using only their first letters.
The lettercode 'BRB' means 'be right back'.