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calender (v.)

"to pass through a calender," a machine which smooths and presses paper, cloth, etc., 1510s, from French calandre, the machine name, from Medieval Latin calendra (see calender (n.)).

calender (n.)

"machine consisting of close-set revolving cylinders or rolls which smooths and presses paper, cloth, etc.," 1510s (late 13c. in calenderer, surname of persons who use such a machine), from Old French calandreur, from Medieval Latin calendra "cloth-pressing machine," so called from the shape of the machine used, from Latin cylindrus, from Greek kylindros "roll, cylinder" (see cylinder).

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Definitions of calender from WordNet
1
calender (v.)
press between rollers or plates so as to smooth, glaze, or thin into sheets;
calender paper
2
calender (n.)
a machine that smooths or glazes paper or cloth by pressing it between plates or passing it through rollers;
From wordnet.princeton.edu