I want to refer to a member of our lab, who is working with me on the same project, and I was wondering what would be the best term to use.
We are both mainly students, but we also work as Research Assistants.
I feel that co-worker might imply that we have a full-time jobs
I also feel that lab member might imply that we do separate/different things since the lab could have many students.
co-student seems perfect if this word existed – we’re both students, but we also work together.
The more usual term in the UK would be fellow student. Academics who work together are colleagues.