n. 闩, 横木, 球门的横木

Crossbar \Cross"bar`\ (-b[aum]r`), n.
A transverse bar or piece, as a bar across a door, or as the
iron bar or stock which passes through the shank of an anchor
to insure its turning fluke down. --Russell.

{Crossbar shot}, a projectile which folds into a sphere for
loading, but on leaving the gun expands to a cross with a
quarter ball at the end of each arm; -- used in naval
actions for cutting the enemy's rigging.