Wordnet 3.0
VERB (1)
1.
be a co-author on (a book, a paper);
The Collaborative International Dictionary of English v.0.48:
coauthor \coauthor\ n.
a writer who collaborates with others in writing something.
Syn: joint author.
[WordNet 1.5]
The Collaborative International Dictionary of English v.0.48:
co-author \co-author\ v. t.
1. to to be an author of, together with another author or
authors; to author jointly with others.
[WordNet 1.5]
2. to exist together at the same time.
Syn: coexist.
[WordNet 1.5]
WordNet (r) 3.0 (2006):
co-author
v 1: be a co-author on (a book, a paper)