noun
: an instrument consisting of two straightedges secured at right angles to each other and used for laying off right angles and testing whether work is square — called also right-angle gauge
noun
: an instrument consisting of two straightedges secured at right angles to each other and used for laying off right angles and testing whether work is square — called also right-angle gauge
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012