Describing flowers or other structures that exhibit radial symmetry, with parts arranged regularly around a central axis like spokes of a wheel. These structures can be divided into equal halves by multiple planes passing through the center.
From Greek 'aktinos' meaning ray or beam and 'morphe' meaning form or shape, literally meaning 'ray-shaped.' Coined in the 19th century to describe the radial symmetry pattern seen in many flowers and other biological structures.
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