[dek-stroh-roh-tuh-tawr-ee, -tohr-ee]
adjective Optics.
  1. turning to the right, as the rotation to the right of the plane of polarization of light in certain crystals and the like. Symbol: d-
Also dex·tro·ro·ta·ry [dek-stroh-roh-tuh-ree] /ˌdɛk stroʊˈroʊ tə ri/.

Origin of dextrorotatory

First recorded in 1875–80; dextro- + rotatory
Related formsdex·tro·ro·ta·tion [dek-stroh-roh-tey-shuh n] /ˌdɛk stroʊ roʊˈteɪ ʃən/, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

dextrorotatory in Medicine


  1. Turning or rotating the plane of polarization of light to the right or clockwise, as for solutions or isomers, usually designated as d- in chemical names.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

dextrorotatory in Science


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