burin(n = noun.artifact) Array - a chisel of tempered steel with a sharp point; used for engraving; Array
is a kind of chisel

1.  The cutting tool of an engraver on metal, used in line engraving. It is made of tempered steel, one end being ground off obliquely so as to produce a sharp point, and the other end inserted in a handle; a graver; also, the similarly shaped tool used by workers in marble. [1913 Webster]

2.  The manner or style of execution of an engraver; as, a soft burin; a brilliant burin. [1913 Webster]

burin, n.
1 a steel tool for engraving on copper or wood.
2 Archaeol. a flint tool with a chisel point.

Etymology:
F

N  engraving, chalcography, line engraving, mezzotint engraving, stipple engraving, chalk engraving, dry point, bur, etching, aquatinta, chiseling, plate engraving, copperplate engraving, steel engraving, wood engraving, xylography, lignography, glyptography, cerography, lithography, chromolithography, photolithography, zincography, glyphography, xylograph, lignograph, glyptograph, cerograph, lithograph, chromolithograph, photolithograph, zincograph, glyphograph, holograph, impression, print, engraving, plate, steelplate, copperplate, etching, mezzotint, aquatint, lithotint, cut, woodcut, stereotype, graphotype, autotype, heliotype, graver, burin, etching point, style, plate, stone, wood block, negative, die, punch, stamp, printing, plate printing, copperplate printing, anastatic printing, color printing, lithographic printing, type printing, three-color process, illustration, illumination, half tone, photogravure, vignette, initial letter, cul de lampe, tailpiece, lapidary, lapidarian, insculptured, engraved, lapidary, sculpsit, imprimit.