quoin

If the carriage is fitted with a quoin, handspikemen standing between the handspikes and the side of the ship, place their handspikes on the steps of the carriage and raise the breech.

From Ordnance Instructions for the United States Navy. 1866. Fourth edition. by United States. Navy Dept. Bureau of Ordnance

Here we saw a flat stone supposed to have been the quoin of a fallen cromlech, and to have been used for sacrificial purposes.

From From John O'Groats to Land's End by Robert Naylor

Back's Inlet presents on each side a succession of lofty precipitous headlands, which have the shape termed, by seamen, "the gunner's quoin."

From Narrative of a Second Expedition to the Shores of the Polar Sea by John Franklin

The figure 8 represents what is called a quoin, and keeps the bolster in its place.

From My Days and Nights on the Battle-Field by Charles Carleton Coffin

Mount Trafalgar made its first appearance in the form of a huge quoin or wedge, resting longitudinally upon the horizon, with its point towards the south-east.

From Discoveries in Australia, Volume 1. With an Account of the Coasts and Rivers Explored and Surveyed During The Voyage of H.M.S. Beagle, in the Years 1837-38-39-40-41-42-43. By Command of the Lords Commissioners of the Admiralty. Also a Narrative Of Captain Owen Stanley's Visits to the Islands in the Arafura Sea. by John Lort Stokes