rocking stone

(redirected from Clach-brath)
Also found in: Dictionary.

rocking stone

[′räk·iŋ ‚stōn]
(geology)
A stone or boulder, often of great size, so finely poised upon its foundation (as on the side of a hill or cliff) that it can be moved slightly backward and forward with little force (as with the hand) and still retain its original position. Also known as roggan.
Mentioned in ?