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co·au·thoror co-au·thor (kō-ô′thər)
A collaborating or joint author.
tr.v. co·au·thored, co·au·thor·ing, co·au·thors or co-au·thored or co-au·thor·ing or co-au·thors
To be a collaborating or joint author of: two colleagues who coauthored an article.
Past participle: co-authored