Definition of "retarder" [re•tard•er]

• Something which retards or slows. (noun)

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• "Then Tartov asked, "Lew, does Earth have something called a retarder-field?""
• "A retarder is a specially designed refrigerator that"
• "Passive TVs use a patterned-retarder film, which divides the screen into alternating lines, much like an interlaced image."