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]
(..) MIA ON INTERCOM: Vincent. I'm on the intercom. Where is it? Where is the intercom? It's on the wall by the two African fellows. MIA: To your right. ... was the son of a preacher man The only boy... MIA: Warm. Warmer. Disco. (..)1994 Pulp Fiction