adjective
having a radiating form or arrangement, like a star
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The actiniform shape of the coral reef was a result of the intricate growth patterns of the polyps.
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The coral reef looked like a bunch of flower petals with its actiniform structure.
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That coral reef is so cool, it's all actiniform and stuff.
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Her hair cascaded down her back in an actiniform manner, resembling a waterfall.