PARALLELOGRAM n.
re, 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 parallelogram the diagonal of which repres…
PILLAR n.
The general and popular term for a firm, upright, insulated support for a superstructure; a pier, column, or post; also, a column or shaft not supporting a superstructure, as one erected for a monument or an ornament. Jacob set a pillar upon her grave. Gen. xxxv. 20. The place . . . vast and proud, Supported by a hundr…
PINK a.
e color called pink (see 6th Pink, 2); as, a pink dress; pink ribbons. Pink eye (Med.), a popular name for an epidemic variety of ophthalmia, associated with early and marked redness of the eyeball. -- Pink salt (Chem. & Dyeing), the double chlorides of (stannic) tin and ammonium, formerly much used as a mordant for m…