floatstone

[ floht-stohn ]

noun

, Masonry.

1. a stone for rubbing bricks to be gauged.

Word History and Origins

Origin of floatstone¹

First recorded in 1695–1705; float + stone

Example Sentences

Dropped in the center of a continent between four wary opponents, I cultivated diplomatic ties with neighbors, built up reserves of petroleum, titanium, and hovering alien "floatstone," and made myself indispensable to those who would attack me.

From The Verge