flint-glass
n. முன்பு சக்கிமுக்கிக் கல்லினாற் செய்யப்பட்ட பளபளப்பான கண்ணாடிக்கலம்.
Flint" glass`. (Chem.) Defn: A soft, heavy, brilliant glass, consisting essentially of a silicate of lead and potassium. It is used for tableware, and for optical instruments, as prisms, its density giving a high degree of dispersive power; -- so called, because formerly the silica was obtained from pulverized flints. Called also crystal glass. Cf. Glass. Note: The concave or diverging half on an achromatic lens is usually made of flint glass.