optical activity

optical activity

noun Physical Chemistry.
the ability of a substance to rotate the plane of polarization of plane-polarized light.

Origin:
1875–80

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Collins
World English Dictionary
optical activity
 
n
the ability of substances that are optical isomers to rotate the plane of polarization of a transmitted beam of plane-polarized light

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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00:10
Optical activity is always a great word to know.
So is doohickey. Does it mean:
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
a gadget; dingus; thingumbob.
American Heritage
Medical Dictionary

optical activity n.
The property of an asymmetrical molecule in solution to rotate the plane of polarized light either clockwise or counterclockwise.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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