a name applied to a person, project, etc. that is being kept secret or that is otherwise unidentified: “Manhattan Project” was the code name for the secret project to develop the atomic bomb
A name assigned to conceal the identity or existence of something or someone.
transitive verbcode-named, code-nam·ing, code-names
To assign a code name to.
code name - Computer Definition
An internal name given to a product under development. For example, Chicago was the code name for Windows 95; Merced was the code name for Intel's Itanium chip.