Plural of compactor; machines or devices that compress materials into a more compact form; multiple devices or people that compact.
From 'compactor' (compact + '-or' agent suffix) in plural form. Emerged as industrial machinery became common in the 20th century.
Modern waste compactors are engineering marvels: truck-mounted compactors can reduce garbage volume by 400-600%, which means one truck does the work of four, saving cities enormous amounts in fuel and landfill space annually.
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