flagstone

[ flag-stohn ]

/ ˈflægˌstoʊn /

Also called flag. a flat stone slab used especially for paving.

flagstones, a walk, terrace, etc., paved with flagstones.

rock, as sandstone or shale, suitable for splitting into flagstones.

Origin of flagstone

First recorded in 1720–30; flag⁴ + stone

They built a redwood garden fence and installed a flagstone court and sidewalks.

Hoover’s Secret Files |Ronald Kessler |August 2, 2011 |DAILY BEAST
The flagstone quarries, mostly situated in the Thurso, Olrig and Halkirk districts, are another important source of revenue.

Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4 |Various
It would be right to send you to your own place on the flagstone of the traitors in hell.

The Unicorn from the Stars and Other Plays |William B. Yeats
It was quarried near Middletown, in 1778, and for sixty years did duty as a flagstone, fortunately with the face downwards.

Animals of the Past |Frederic A. Lucas

She halted on a flagstone of the descending path some six feet above the roadway, and stood expectant.

Mr. Crewe's Career, Complete |Winston Churchill
She saw that one pair of feet had paddled across the flagstone floor of the porch.

The Rainbow |D. H. (David Herbert) Lawrence

flagstone

/ (ˈflæɡˌstəʊn) /

a hard fine-textured rock, such as a sandstone or shale, that can be split up into slabs for paving

a slab of such a rock

C15 flag (in the sense: sod, turf), from Old Norse flaga slab; compare Old English flæcg plaster, poultice