| Front | orrery \OR-uh-ree\ |
|---|---|
| Back | noun A mechanical model of the solar system that represents the relative motions of the planets around the sun. [After Charles Boyle, 4th Earl of Orrery (1676-1731), who was given one of those models by John Rowley, a London instrument-maker. They were invented by George Graham c. 1700. The device would have been better named either after its inventor, Graham, or its maker, Rowley.] |
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