Relating to or describing a mouth-like opening with ray-like structures radiating around it.
From Greek 'aktis' (ray) + 'stoma' (mouth) + Latin '-alis' (relating to). Used primarily in biological descriptions of organisms and their anatomy.
In sea anemones and coral polyps, the actinostomal opening is literally surrounded by tentacle-rays that catch food—it's like having a mouth with built-in grabbing arms!
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