A small circular area or space, such as the colored ring around a nipple or a small space between plant veins.
From Latin 'areola', the diminutive of 'area' (open space). Originally used in anatomy, it's now used in biology and botany to describe any small distinct circular region.
The areola was named by anatomists who thought it resembled a tiny 'open space' or 'area'—the same Latin root gives us words like 'arena' and helps explain why we call a plaza an 'area.'
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