PARALLELOGRAM n.
A right-lined quadrilateral figure, whose opposite sides are parallel, and consequently equal; -- sometimes restricted in popular usage to a rectangle, or quadrilateral figure which is longer than it is broad, and with right angles. Parallelogram of velocities, forces, accelerations, momenta, etc. (Mech.), a parallelog…
PENDANT n.
A hanging ornament on roofs, ceilings, etc., much used in the later styles of Gothic architecture, where it is of stone, and an important part of the construction. There are imitations in plaster and wood, which are mere decorative features. "[A bridge] with . . . pendants graven fair." Spenser.