[ dek-stroh-roh-tuh-tawr-ee, -tohr-ee ]
/ ˌdɛk stroʊˈroʊ təˌtɔr i, -ˌtoʊr i /

adjective Optics.

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 forms

dex·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. 2019

British Dictionary definitions for dextrorotation


/ (ˌdɛkstrəʊrəʊˈteɪʃən) /


a rotation to the right; clockwise rotation, esp of the plane of polarization of plane-polarized light passing through a crystal, liquid, or solution, as seen by an observer facing the oncoming lightCompare laevorotation

Derived Forms

dextrorotatory (ˌdɛkstrəʊˈrəʊtətərɪ, -trɪ) or dextrorotary, adjective
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

Medicine definitions for dextrorotation


[ dĕk′strə-rōtə-tôr′ē ]


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.

Science definitions for dextrorotation (1 of 2)


[ dĕk′strə-rō-tāshən ]

The clockwise rotation of the plane of polarization of light (as observed when looking straight into the incoming light) by certain substances, such as crystals, and by certain solutions. Dextrorotation is caused by a particular arrangement of the atoms in a molecule of the substance. Compare levorotation.

Science definitions for dextrorotation (2 of 2)


[ dĕk′strə-rōtə-tôr′ē ]

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