Having a smooth, shiny, glass-like appearance; resembling glaze or having the quality of being slick and smooth.
From 'glaze' plus the adjectival suffix -y, which means 'resembling or full of.' This follows the pattern of words like 'hazy' and 'crazy' that use -y to create descriptive adjectives.
Ceramicists describe the 'glazy look' as the moment during kiln firing when particles fuse at the molecular level—it's the same physics as how glass forms, which is why glazed pottery is technically partially vitrified (glass-like).
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