allonymous
al·lo·nym
(ăl′ə-nĭm′)n.
The name of a person, usually a historical person, assumed by a writer.
[French allonyme : Greek allos, other; see allo- + Greek onoma, name; see nō̆-men- in Indo-European roots.]
al·lon′y·mous (ə-lŏn′ə-məs) adj.
al·lon′y·mous·ly adv.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.