ganister means A hard, fine-grained sandstone, used in manufacturing silica bricks for lining furnaces.
ganister is pronounced /ˈɡænɪstə(ɹ)/.
noun
- A hard, fine-grained sandstone, used in manufacturing silica bricks for lining furnaces.“Like those in southern Huntingdon County, the ridges of southern Blair County were often covered with ganister.”