A person or device that marks or divides something into regular graduated intervals or scales, such as on a measuring instrument.
From Latin graduatus (marked in degrees), the past participle of graduare, derived from gradus (step). The -or suffix indicates an agent or device performing the action.
Before digital displays, skilled craftspeople called graduators hand-marked thermometers, rulers, and gauges with precise tiny lines—their work required geometry knowledge and steady hands.
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