orreries

[awr-uh-ree, or-]

or·rer·y

[awr-uh-ree, or-]
noun, plural or·rer·ies.
1.
an apparatus for representing the positions, motions, and phases of the planets, satellites, etc., in the solar system.
2.
any of certain similar machines, as a planetarium.

Origin:
1705–15; named after Charles Boyle, Earl of Orrery (1676–1731), for whom it was first made
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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Orreries is always a great word to know.
So is quincunx. Does it mean:
a scrap or morsel of food left at a meal.
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
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