Pseudonym

Pseudonym [ SOOD-n-im ]
	[ noun ]
	MEANING :
	1. a pen name 2. a fictitious name used by an author to conceal his or her identity 3. a nickname or alias
	USAGE EXAMPLE 1 :
	One of the employees wrote a letter to the manager criticizing the new policies being enforced by the company and signed it with a pseudonym.