pseu·do·nym 
/ˈsu:dəˌnɪm/ noun
plural pseu·do·nyms /ˈsu:dəˌnɪm/ noun [count] : a name that someone (such as a writer) uses instead of his or her real name
▪ Mark Twain is the pseudonym of the American writer Samuel L. Clemens. ▪ She preferred to write under a pseudonym. [=using a false name instead of her real name] — compare 2alias
▪ Mark Twain is the pseudonym of the American writer Samuel L. Clemens. ▪ She preferred to write under a pseudonym. [=using a false name instead of her real name] — compare 2alias
— pseu·don·y·mous /suˈdɑ:nəməs/ adjective
▪ a pseudonymous author
/suˈdɑ:nəməs/ adjective ▪ a pseudonymous author
