n.
<法> 假名

[ noun ]
a fictitious name used when the person performs a particular social role
<noun.communication>

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.