The Collaborative International Dictionary of English v.0.48:

Artilleryman \Ar*til"ler*y*man\, n.
   A man who manages, or assists in managing, a large gun in
   firing.
   [1913 Webster]

WordNet (r) 3.0 (2006):

artilleryman
    n 1: a serviceman in the artillery [syn: artilleryman,
         cannoneer, gunner, machine gunner]