[lee-vuh-roh-tuh-tawr-ee, -tohr-ee]
adjective Optics, Chemistry, Biochemistry.
turning to the left, as the rotation to the left of the plane of polarization of light in certain crystals and compounds. Symbol: l-
Also, levorotary [lee-vuh-roh-tuh-ree] .

1870–75; levo- + rotatory

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American Heritage
Medical Dictionary

levorotatory le·vo·ro·ta·to·ry (lē'və-rō'tə-tôr'ē) or le·vo·ro·ta·ry (-rō'tə-rē)

  1. Turning or rotating the plane of polarization of light to the left.

  2. Of or relating to a chemical solution that rotates such a plane to the left.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
levorotatory   (lē'və-rō'tə-tôr'ē)  Pronunciation Key 
Relating to a substance that causes levorotation.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
The levorotatory form of norgestrel and synthetic progestogen with progestational and androgenic activity.
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