Dave and Larry wrote a book together,
Dave is the main author and Larry is the coauthor.
Generally co-author should be hyphenated, but the relaxed rules of modern times often present coauthor as one word
The word coauthor is a noun. The plural noun is coauthors.
It means that they are sharing credit. There is more than one author.
It means that more than one author wrote a book/article together.
coauthor
no.
There is no one-word anagram, and no valid hyphenated form. The letters spell the word pairs "coauthor is" and "auto choirs." It is likely that the scramble was miscopied.
According to the sources I've found on a quick search, you should hyphenate 'coauthor', i.e., it would better be: "co-author".
III, I, II
Examples of co are cooperate, coworker, coauthor and so on.
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a sentence with the word variety