nom de plume /ˌnɒm də ˈpluːm $ ˌnɑːm-/ BrE AmE noun ( plural noms de plume (same pronunciation) ) [countable] formal
[ Date: 1800-1900 ; Language: French ; Origin: 'pen name' ]
a name used by a writer instead of their real name SYN pen name
nom de plume /ˌnɒm də ˈpluːm $ ˌnɑːm-/ BrE AmE noun ( plural noms de plume (same pronunciation) ) [countable] formal
[ Date: 1800-1900 ; Language: French ; Origin: 'pen name' ]
a name used by a writer instead of their real name SYN pen name
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012