wallstone
nounEtymology From Middle English walle ston, from Old English weallstān (“stone for building”), equivalent to wall + stone.
1
Architecture Stone used for building, especially in the construction of walls.
- In the upper stories the walls are built hollow, the utilised internal linings of brick, and the outer walling built of coursed rubble wallstones from the old demolished building, […]1902, Building, volume 82, page 292:
- The remainder is used for wallstone or is finely ground for use as filter or as a feed supplement.1979, Raymond R. Burchett, The Mississippian and Pennsylvanian (Carboniferous) Systems in the United States—Nebraska: