The motion of something that rocks.
The abrading of a copper plate with a rocker, preparatory to mezzotinting.
The motion by which the design on a steel mill is transferred to a copper cylinder.
Excellent; great.
Shaking, swaying or moving back and forth.
The process of being heaved upward, especially the raising of part of the earth's crust.
Disruptive change, from one state to another.
A sudden violent upset, disruption or convulsion.