Having a body structure arranged like spokes radiating out from the centre of a wheel.
"the arrangement of parts in an organ or organism such that cutting through the center of the structure in any direction produces two halves that are mirror images of each other. The stems and roots of plants usually show radial symmetry, while all animals belonging to Cnidaria (e.g. jellyfish) and Echinodermata (e.g. starfish) are radially symmetrical - and typically sessile - in their adult form" (503)
Divisible into equal halves by two or more planes of symmetry (Fig. 4.18); also called actinomorphic. Example 1, Example 2
the property of symmetry about an axis; "the starfish illustrates radial symmetry"
Characterizing a body shaped like a pie or barrel, with many equal parts radiating outward like the spokes of a wheel; present in cnidarians and echinoderms.
The condition in which two halves of a body are mirror images of each other regardless of the angle of the cut, providing the cut is made along the center line. Thus, a cylinder cut lengthwise down its center displays this form of symmetry. (Contrast with biradial symmetry.)
Radial symmetry is when a basic shape unit is repeated around a central point (for example, most flowers have radial symmetry).
a form of body symmetry in which the parts of an animal are arranged concentrically around a central oral/aboral axis and more than one imaginary plane through this axis results in halves that are mirror-images of each other. Examples are cnidarians (Phylum Cnidaria, jellyfish, anemones, and corals). a kind of body symmetry where the animal is arranged around a central axis, examples are jellyfish and anemones.