The phrase "to write a publication" means to create and put together written content that will be made available to the public for reading. Full definition
In the meantime you can not write publications about your findings. (nextscientist.com)
He has extensive experience communicating his investment views to various audiences through written publications, presentations, and media appearances. (wellsfargoadvisors.com)
Try to write some publications during your study and if you can find an elective in a clinical research organisation this will help a lot. (sciencemag.org)