UK:*UK and possibly other pronunciationsUK and possibly other pronunciations/smɔːlt/US:USA pronunciation: respellingUSA pronunciation: respelling(smôlt)

WordReference Random House Unabridged Dictionary of American English © 2020
smalt  (smôlt),USA pronunciation n. 
  1. Ceramicsa coloring agent made of blue glass produced by fusing silica, potassium carbonate, and cobalt oxide, used in powdered form to add color to vitreous materials.
  • Italian smalto smalto
  • Middle French
  • 1550–60

Collins Concise English Dictionary © HarperCollins Publishers::
smalt /smɔːlt/ n
  1. a type of silica glass coloured deep blue with cobalt oxide
  2. a pigment made by crushing this glass, used in colouring enamels
Etymology: 16th Century: via French from Italian smalto, of Germanic origin; related to smelt1
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