meaning of trunnions
1.  A cylindrical projection on each side of a piece, whether gun, mortar, or howitzer, serving to support it on the cheeks of the carriage.  See Illust.  of Cannon. 
2.  A gudgeon on each side of an oscillating steam cylinder, to support it.  It is usually tubular, to convey steam. 
						 
Related Words
trunnion | trunnioned |
