FLINT n.
Anything extremely hard, unimpressible, and unyielding, like flint. "A heart of flint." Spenser. Flint age. (Geol.) Same as Stone age, under Stone. -- Flint brick, a fire made principially of powdered silex. -- Flint glass. See in the Vocabulary. -- Flint implements (Archæol.), tools, etc., employed by men before th…