co·au·thor or co-au·thor (kō-ôthər)
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.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.