"Web dev" is a shortened version of the term "web development," which refers to the process of creating and maintaining websites and web applications. Full definition
I found it by carefully studying good web dev resumes. (resumehacking.com)
Of course, I am an experienced web dev, so it my approach isn't recommended. (thebookdesigner.com)
Even if the other parts of the resume mention that you're good at web dev too, your resume will get discarded long before the recruiter reaches any other section. (velvetjobs.com)