Bilateral symmetry



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.
Historical Examples

Elementary Zoology, Second Edition Vernon L. Kellogg
The Works of Francis Maitland Balfour, Volume III (of 4) Francis Maitland Balfour
The Works of Francis Maitland Balfour, Volume II (of 4) Francis Maitland Balfour
The Sea-beach at Ebb-tide Augusta Foote Arnold
Harvard Psychological Studies, Volume 1 Various
Harvard Psychological Studies, Volume 1 Various
Report on the Radiolaria Collected by H.M.S. Challenger During the Years 1873-1876, Second Part: Subclass Osculosa; Index Ernst Haeckel
The Works of Francis Maitland Balfour, Volume II (of 4) Francis Maitland Balfour
Over the Teacups Oliver Wendell Holmes, Sr.
The Whence and the Whither of Man John Mason Tyler

noun
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
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.

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