A large Mesolithic or Neolithic chisel-ended flint artifact with a sharp straight cutting edge, produced by the removal of a thick flake at a right angle to the main axis of the tool. The technique was used for the manufacture of axes and adzes and allowed a blunted tool to be resharpened by removing another flake from across the edge. The tranchet technique has two definitions: 1) the removal of a large flat flake from the tip of a biface to form a straight cutting edge from the edge of the tranchet flake scar or, 2) the technique used to create or resharpen the ax or adze's cutting edge.