miter square


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miter square

n.
An instrument with straight edges that are set at a 45° angle or that are adjustable, used for marking the angles of a miter joint.

mi′ter square`


n.
an instrument for laying out miter joints, consisting of two straightedges joined at a 45° angle.
[1670–80]
References in periodicals archive ?
Necessary tools include a table saw, miter square, nail set, eight 3-inch C-clamps, and sanding blocks or (preferably) a power sander.
* Miter squares measure 450[degrees] angles or bevels on one side of the square and 135[degrees] angles and bevels on the other side.