rocking stone

any fairly large rock so situated on its base that slight forces can cause it to move or sway.

Also called logan stone, loggan stone, logging stone.

Origin of rocking stone

First recorded in 1730–40

Tony and Reggie had been sailing, and had stopped at the Rocking-stone on their way back to the School.

Deering of Deal |Latta Griswold
Accordingly, we made up our minds to creep on to the top of the rocking-stone and lie there in readiness.

She |H. Rider Haggard
It had scarcely roused him when Rollitt had picked him up two hours ago from his roost under the rocking-stone.

The Cock-House at Fellsgarth |Talbot Baines Reed
On the summit stands the famous Logan rocking-stone, which is said to weigh eighty tons.

A Yacht Voyage Round England |W.H.G. Kingston

This is thought to be a myth relating to some Welsh rocking-stone no longer known.

British Goblins |Wirt Sikes

rocking stone

a boulder so delicately poised that it can be rocked Also called: logan, logan-stone