The Collaborative International Dictionary of English v.0.48:
Crosse \Crosse\, n. [F., crosier, hooked stick.] The implement with which the ball is thrown and caught in the game of lacrosse. [Webster 1913 Suppl.]WordNet (r) 3.0 (2006):
crosse n 1: a long racket with a triangular frame; used in playing lacrosse