Flint

flint, n. a hard mineral, a variety of quartz, from which fire is readily struck with steel: anything proverbially hard.— adj. made of flint, hard.— n. Flint′-gla , a very fine and pure kind of gla , so called because originally made of calcined flints.— adjs. Flint′-heart , -ed ( Shak. ), having a hard heart.— v.t. Flint′ify , to turn to flint.— ns. Flint′ine ; Flint′-lock , a gun-lock having a flint fixed in the hammer for striking fire and igniting the priming.— adj. Flint′y , consisting of or like flint: hard: cruel.— Flint implements , arrow, axe, and spear heads, . made by man before the use of metals, commonly found in prehistoric graves, . [A.S. flint ; Dan. flint ; Gr. plinthos , a brick.]