The story
From Old French suin de verre, suint de verre, literally "grease of glass".
Etymology from Wiktionary, CC BY-SA 4.0.
Today it means: A scum that forms on molten glass. Full definition →
From Old French suin de verre, suint de verre, literally "grease of glass".
Etymology from Wiktionary, CC BY-SA 4.0.