Relating to a crown or something crown-shaped, often used in medical terms to describe parts of the body arranged in a crown-like pattern.
From Latin 'corona' (crown), which came from Greek 'korōnē.' Medical terminology heavily uses this root for any body structure that encircles or sits on top.
The 'coronal mass ejection' from the sun is so named because the sun's corona looks like a glowing crown around it during eclipses—the same root gives us 'coronation,' 'coronary' (heart arteries that encircle the heart), and 'coronavirus' (spiky crown-shaped virus).
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