One who, or that which, trembles.
The vibrating hammer, or spring contact piece of a hammer break, as of the electric ignition apparatus for an internal combustion engine.
Any of various New World passerine birds of the family Mimidae.
A sudden violent upset, disruption or convulsion.
Disruptive change, from one state to another.
The process of being heaved upward, especially the raising of part of the earth's crust.