[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 le·vo·ro·ta·ry [lee-vuh-roh-tuh-ree] /ˌli vəˈroʊ tə ri/.

Origin of levorotatory

First recorded in 1870–75; levo- + rotatory
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for levorotatory

Historical Examples of levorotatory

  • Heinemann shows116 that lactic acid exists in two optical modifications, the levorotatory and dextrorotary acids.

    The Book of Cheese

    Charles Thom and Walter Warner Fisk

  • The gums are translucent, amorphous substances, whose solutions in water are levorotatory.

    The Chemistry of Plant Life

    Roscoe Wilfred Thatcher

levorotatory in Medicine




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

levorotatory in Science



Relating to a substance that causes levorotation.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.