(obsolete) A solution of silica, or flints, in potash.

plural of eccentric flint

A soft, heavy, brilliant glass, consisting essentially of a silicate of lead and potassium. It is used for tableware and in optical instruments.

hardhearted

plural of flint glass

sandpaper

Synonym of Indian corn (“variety of maize with different-coloured kernels”)

(hyperbolic, figuratively) Go to great lengths to save or gain something, particularly money. / Used other than figuratively or idiomatically: see skin, a, flint.

An opaque, flint-like, ferruginous variety of quartz.

(pottery) A mill in which flints are ground.