Source : Webster's Revised Unabridged Dictionary (1913)

Nom \Nom\, n. [F. See {Noun}.]
   Name.

   {Nom de guerre}, literally, war name; hence, a fictitious
      name, or one assumed for a time.

   {Nom de plume}, literally, pen name; hence, a name assumed by
      an author as his or her signature.

Source : WordNet®

nom de guerre
     n : a fictitious name used when the person performs a particular
         social role [syn: {pseudonym}, {anonym}]