I thought as I received notable words from Wordnik's Word of the Day service, I'd post them here. If you like, sign-up for Wordnik's Word of the Day service yourself.
An arrangement of five objects in a square, one at each corner and one in the middle; especially, an arrangement, as of trees, in such squares continuously.
In botany, same as quincuncial estivation.
In astrology, the position of planets when distant from each other five signs or 150°.
A Roman brass coin of five unciæ.
A reliquary in the shape of a cross, the four parts of which can be folded over the central one.