book tile

noun

1. a flat, cellular roofing tile having two parallel edges one of which is convex and the other concave, so that a number may be fit together edge to edge between rafters, joists, etc.

Example Sentences

Tile is sometimes an afterthought at the start of a remodel or a design project, but Catherine Bailey and Robin Petravic are hoping their new book, "Tile Makes the Room," can inspire us to reorder our priorities.

From Los Angeles Times

On this assumed watertight surface 3-in. book tile was laid with joints normal to the gutter and cemented.

From Project Gutenberg