Glossary

A try square the arm of which is at right angles to the handle; the position of the arm may be moved

A device installed in a drainage system into which the discharge of  acid is probable; neutralizes the discharge sufficiently to permit

A small ornament in the shape of a nut of the oak tree; sometimes used as a finial, pendant, or decorative element

In a church, a sound reflector behind and over a pulpit.

A monastery or convent; particularly the church thereof.

In the plane Cartesian coordinate system, the horizontal coordinate of a point on a plane; the x-coordinate, obtained by measuring the distance from

A masonry mass (or the like) which receives the thrust of an arch, vault, or strut.