A line or direction that points toward or is directed to a central axis or radius.
From Latin 'ad-' (toward) + 'radius' (ray, spoke of a wheel). A technical term combining these Latin elements to describe geometric or anatomical relationships.
Think of 'adradius' as the invisible guideline pointing from anywhere on an organism toward its central axis—it's how biologists describe the symmetry and growth patterns of creatures like sea stars.
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