A machine or device that compresses or presses materials into a more compact form; one who compacts.
From 'compact' + '-er' (agent suffix). Originally referred to a person who compacts; evolved to primarily describe mechanical devices used in construction, waste management, and materials processing.
A modern landfill compacter can exert forces of 400,000+ pounds per square inch—powerful enough to crush entire vehicles into cubes, fundamentally changing how we manage waste on an industrial scale.
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