The word "pseudonym" denotes the name adopted by an author in place of their real name, typically used for publishing or writing.
### Definition:
- Pseudonym: A fictitious name used by an author instead of their real name. It is commonly used for privacy, anonymity, or for artistic purposes.
For example:
- Mark Twain was the pseudonym of the American author Samuel Clemens.
- George Orwell was the pseudonym of the British author Eric Arthur Blair.
So, the word "pseudonym" is the correct term for a name used by an author to hide their identity.