The Collaborative International Dictionary of English v.0.48:
Carbineer \Car`bi*neer"\, n. [F. carabinier.] (Mil.) A soldier armed with a carbine. [1913 Webster]WordNet (r) 3.0 (2006):
carbineer n 1: a soldier (historically a mounted soldier) who is armed with a carbine [syn: carbineer, carabineer, carabinier]