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bilateral symmetry
noun
, Biology.
- 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.
bilateral symmetry
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-lăt′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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Word History and Origins
Origin of bilateral symmetry1
First recorded in 1850–55
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Example Sentences
The flatworms are the first animals to assume pronounced bilateral symmetry.
From Project Gutenberg
Bilateral symmetry has long been recognized as a primary principle in æsthetic composition.
From Project Gutenberg
Unequal division would thus be an instance of bilateral symmetry.
From Project Gutenberg
A bilateral symmetry is thus even at this stage clearly indicated.
From Project Gutenberg
Its bilateral symmetry is further indicated by a median longitudinal furrow.
From Project Gutenberg
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