A person or tool that shapes something into a cylinder or operates a cylindrical machine.
From 'cylinder' plus the agent suffix '-er' (one who does). This occupational or functional noun indicates someone engaged in the process of cylindering or using cylindrical equipment.
In the era of paper mills and textile factories, cylinderers were skilled workers whose ability to maintain perfectly smooth, round cylinders determined the quality of entire factory outputs—a humble job with enormous responsibility.
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