This arrangement of the body in similar halves among animals is known as bilateral symmetry.
The bilateral symmetry of the larva is, on this view, secondary, like that of so many Cœlenterate larv.
A bilateral symmetry is thus even at this stage clearly indicated.
bilateral symmetry: Having two equal sides, divided by a central axis.
Unequal division would thus be an instance of bilateral symmetry.
bilateral symmetry has long been recognized as a primary principle in æsthetic composition.
In only a few genera this bilateral symmetry is not expressed, and a simpler, more regular fundamental form appears.
Its bilateral symmetry is further indicated by a median longitudinal furrow.
Are not almost all brains a little wanting in bilateral symmetry?
The bilateral symmetry has arisen in connection with this mode of locomotion and is thus a mark of important progress.
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.
|bilateral symmetry |
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.