Plural of glazing; coatings of glass or glaze applied to surfaces, or the process and materials used in this application.
From 'glaze' plus the -ing suffix (forming gerunds or plural nouns). 'Glazing' can mean both the action of applying glaze and the material itself.
Double-glazing (two panes with air between them) was invented to improve insulation, but it actually became one of the most important energy-saving innovations in building history—a window upgrade that saves millions in heating costs worldwide.
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