rocking-stone
Noun
Meaning
A stone, often of great size and weight, resting upon another stone, and so exactly poised that it can be rocked, or slightly moved, with but little force.
Source: Webster's dictionaryNoun
A stone, often of great size and weight, resting upon another stone, and so exactly poised that it can be rocked, or slightly moved, with but little force.
Source: Webster's dictionary