from The Century Dictionary and Cyclopedia
- n. A raised rim forming a shoulder around the trunnion on the side of the gun.
- n. A plate of iron covering the top of a wooden gun-carriage on each side, and carried down into the recess for the trunnion so as to take the weight of the gun, and prevent it from crushing the wood. See cut under gun-carriage.
Sorry, no etymologies found.