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bilateral symmetry

noun, Biology
1.
a basic body plan in which the left and right sides of the organism can be divided into approximate mirror images of each other along the midline.
Compare radial symmetry.
Origin
1850-1855
1850-55
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for bilateral symmetry
  • For those groups to be so different, bilateral symmetry must have been around for a while.
  • These three challenges revealed that starfish have a hidden bilateral symmetry, and move in a preferred direction.
British Dictionary definitions for bilateral symmetry

bilateral symmetry

noun
1.
the property of an organism or part of an organism such that, if cut in only one plane, the two cut halves are mirror images of each other See also radial symmetry
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
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bilateral symmetry in Medicine

bilateral symmetry n.
Symmetrical arrangement, as of an organism or a body part, along a central axis, so that the body is divided into equivalent right and left halves by only one plane.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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bilateral symmetry in Science
bilateral symmetry
  (bī-lāt'ər-əl)   
Symmetrical arrangement of an organism or part of an organism along a central axis, so that the organism or part can be divided into two equal halves. Bilateral symmetry is a characteristic of animals that are capable of moving freely through their environments. Compare radial symmetry.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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