A small circular object or a circle of small size; an extremely rare or obsolete diminutive form.
From Latin 'circulus' + the diminutive suffix '-let' (borrowed from Old French). This variant diminutive never achieved currency in English, existing mostly in historical or technical documents.
The '-let' suffix gave us useful words like 'booklet' and 'droplet,' but 'circulet' never caught on—probably because 'small circle' was just easier. It's a reminder that not every grammatically possible word succeeds.
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