A scum that forms on molten glass.
More example sentences
- If a small quantity, even a pint of water were to be thrown into a crucible of glass in a melted or rather a melting state, while the scum or sandiver is upon its surface, the water would be converted instantly into steam so that an explosion would take place; and if the quantity of water were more considerable, the furnace would be blown down.
late Middle English: apparently from Old French suin de verre 'exudation from glass', from suer 'to sweat' + verre 'glass'.
Definition of sandiver in:
- The British & World English dictionary