from The American Heritage® Dictionary of the English Language, 4th Edition
- n. An arrangement of five objects with one at each corner of a rectangle or square and one at the center.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An arrangement of five units in a pattern corresponding to the five-spot on dice, playing cards, or dominoes.
- n. An angle of five-twelfths of a circle, or 150°, between two objects.
- n. A bronze coin minted during the Roman Republic, valued at five-twelfths of an as.
from the GNU version of the Collaborative International Dictionary of English
- n. An arrangement of things by fives in a square or a rectangle, one being placed at each corner and one in the middle; especially, such an arrangement of trees repeated indefinitely, so as to form a regular group with rows running in various directions.
- n. The position of planets when distant from each other five signs, or 150°.
- n. A quincuncial arrangement, as of the parts of a flower in æstivation. See Quincuncial, 2.
from The Century Dictionary and Cyclopedia
- n. An arrangement of five objects in a square, one at each corner and one in the middle (thus, ); especially, an arrangement, as of trees, in such squares continuously.
- n. In botany, same as quincuncial estivation (which see, under quincuncial).
- n. In astrology, the position of planets when distant from each other five signs or 150°.
- n. A Roman brass coin of five unciæ.
- n. A reliquary in the shape of a cross, the four parts of which can be folded over the central one.
Latin quīncūnx, quīncūnc-, five twelfths : quīnque, five; see penkwe in Indo-European roots + ūncia, twelfth part of a unit; see ounce1.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin quincunx (Wiktionary)