STRAIGHTEDGE
Source: 567
Straight″edge′ (?), n. A board, or piece of wood or metal, having one edge perfectly straight, — used to ascertain whether a line is straight or a surface even, and for drawing straight lines.
Source: 567
Straight″edge′ (?), n. A board, or piece of wood or metal, having one edge perfectly straight, — used to ascertain whether a line is straight or a surface even, and for drawing straight lines.