bullnose tile
n.— «Because ceramic tile is often 1/4-inch thick—and sometimes thicker—the transition from tile to the wall surface must be made with trim tiles that have a finished edge on at least one side. These special tiles frequently are referred to as bullnose tiles. They have a soft, rounded edge that is the same color as the tile.» —“Tile backsplashes add focal point to kitchens, bathrooms” by Tim Carter Arizona Republic (Phoenix) June 30, 2007. (source: Double-Tongued Dictionary)
Further reading
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