Covered with, made of, or fitted with glass; having a smooth glass-like surface or coating.
From 'glass' (noun/verb) + '-ed' (past participle/adjective suffix). Originally a verb meaning to fit with glass, then used adjectivally to describe the resulting state.
When archaeologists find 'glassed' sand in deserts, it means lightning struck so hot it melted the sand instantly—turning ordinary desert into shiny glass in a single millisecond!
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