Definify.com
Webster 1913 Edition
Crossbar
Cross′barˊ
(-bärˊ)
, Noun.
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.