ra'dial sym'metry

a basic body plan in which the organism can be divided into similar halves by passing a plane at any angle along a central axis, characteristic of sessile and bottom-dwelling animals, as the sea anemone and starfish. Cf. bilateral symmetry.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

radial sawradial tire
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