The Collaborative International Dictionary of English v.0.48:
Fourhanded \Four"hand`ed\, a. 1. Having four hands; quadrumanous. --Goldsmith. [1913 Webster] 2. Requiring four "hands" or players; as, a fourhanded game at cards. [1913 Webster]WordNet (r) 3.0 (2006):
fourhanded adj 1: (of card games) involving or requiring four players