Noun
a device for overcoming resistance at one point by applying force at some other point
Source: WordNetA wedge is a simple machine that transforms lateral force and movement of the tool into a transverse splitting force and movement of the workpiece. Source: Internet
The idea of a simple machine originated with the Greek philosopher Archimedes around the 3rd century BC, who studied the Archimedean simple machines: lever, pulley, and screw. Source: Internet