pseudonym

A fictitious name, especially a pen name.

A false name; especially, a fictitious name assumed by an author in order to conceal or veil his identity.

In natural history, the vernacular name of a species or other group of animals or plants, as distinguished from its tenable technical name: thus, robin is the pseudonym of Turdus migratorius.

A fictitious name assumed for the time, as by an author; a pen name; an alias.

A fictitious name, often used by writers and movie stars.

a fictitious name used when the person performs a particular social role