slab

One example Lewis gives: The hot rolling mill, which squeezes red hot steel slabs into giant coils, at U.S.

In a tiny community just outside of Whitehouse, Robert Morris rested against a slab of broken concrete.

But the thing on the left is just a geometric slab of no discernible purpose, a plinth with no identity.

Four massive concrete slabs jut into the room at second-story level, a move that is meant to celebrate structure—the museum’s director calls them “internal flying buttresses.”

As each fragment detaches, it can open "slab windows" where hot mantle material rises toward the surface, creating bursts of volcanic activity.