A small crater or a crater-like depression; a diminutive or minor crater.
From crater + -kin (a diminutive suffix from Middle English and Germanic languages meaning 'little' or 'dear'). The suffix appears in words like pumpkin and lambkin.
The -kin suffix is one of English's coziest diminutives, making big things sound cute—which is why small craters look less menacing when scientists call them craterkins.
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