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centrad

Pronunciation: sen′trad

Definition:

  1. Toward the center.
  2. A unit of measurement of the refracting strength of a prism; it corresponds to the deviation of a ray of light, the arc of which is 1/100 of the radius of the circle, or 0.57°.
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© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.
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