A machine with heavy rollers used to smooth, press, and gloss paper, cloth, or other materials; or to process materials through such a machine.
From French calandre, from Italian cilindro, from Latin cylindrus, meaning 'cylinder or roller.' The device was named for its most obvious feature.
The calender is one of those inventions that sounds boring but changed everything—it's why your school notebook isn't rough and crinkly, and why fine fabrics became affordable luxuries.
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