a teaching/research 'fellow' [=a graduate student who gets money in exchange for teaching/research]
He attended the concert with a 'fellow' student. [=someone who is a student, as he is]
He has always tried to be of service to 'his fellow man'. [=to other people]
(..) to the five corners of the world... ...and let me tell you, I've never seen anything like this! When I met this man... ...he was picking oranges in Florida. His fellow workers called him El Penumbra. "The Shadow." Because when you worked beside him... ...he blocked out the daylight! (..)2003 Big Fish