A co-author is someone who helps write a book, article, or other written work with another person. They work together to create the written work and share credit for it. Full definition
I am angry, My husband co author is recovering from an operation. (authorimprints.com)
It was co authored by Tim Leunig, a former Lib Dem Council candidate who signed Nick Clegg's leadership nomination papers. (conservativehome.blogs.com)
This is way past the point of pettiness that I would usually care about, but I stand by my original point that whoever originally said «having looked at a bunch of «scientific» or «research» code, you can pretty much tell that it is written on the fly, haha, more like agile dev cause you may have co authors asking you to make changes all along the way and then reviwers can come along and demand changes.» (climateaudit.org)