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optical rotation

noun Physical Chemistry.
  1. the angle at which the plane of polarized light is rotated when passed through an optically active substance.
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Origin of optical rotation

First recorded in 1890–95
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for optical rotation

optical rotation

noun
  1. the angle through which plane-polarized light is rotated in its passage through a substance exhibiting optical activity
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

optical rotation in Medicine

optical rotation

n.
  1. The change or rotation in the plane of polarization that occurs when polarized light is passed through an optically active substance.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.