1. straightedge - Noun
2. straightedge - Adjective
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: Webster's dictionaryA sharp pencil is held up against the straightedge, sandwiching the thread tautly against the straightedge. Source: Internet
A sliding straightedge known as a T-square is then placed on one of the sides, allowing it to be slid across the side of the table, and over the surface of the paper. Source: Internet
A straightedge structure that further redefines modern minimalism with a stylish flair. Source: Internet
A ruler can be used both as a straightedge and a device to compute proportions. Source: Internet
A straightedge of length S is attached to one focus F 1 at one of its corners A so that it is free to rotate about that focus. Source: Internet
For example, the problem of trisecting an angle with a compass and straightedge is one that naturally occurs within the theory, since the axioms refer to constructive operations that can be carried out with those tools. Source: Internet