Function: noun
Date: circa 1877
: an instrument consisting of two straightedges fixed at right angles to each other and used for laying off right angles and testing whether work is square
Function: noun
Date: circa 1877
: an instrument consisting of two straightedges fixed at right angles to each other and used for laying off right angles and testing whether work is square
Merriam Webster Collegiate English Dictionary. Merriam Webster - Энциклопедический словарь английского языка. 2012