pseudonymous

Of or pertaining to a pseudonym.

Adjective

Of or pertaining to a pseudonym.
Fictitious.
- The abuse of children that goes on under the pseudonymous and euphemistic titles of "intergenerational sex" and "sexual liberation." - 1984 August 18, Victoria A. Brownworth, “Rights Require Responsibility”, in Gay...
That uses a pseudonym.
- My angle has been more positivistic, my interest arising not out of the general phenomenon of pseudonymity, but out of particular puzzles posed by particular texts assigned to one pseudonymous writer. - 2006, Penny...
Pertaining to pseudonymization.

From Latin pseudōnymus, from Ancient Greek ψευδώνῠμος (pseudṓnŭmos). By surface analysis, pseudonym + -ous.