Ŏr're-ry, n.

n. [So named by Sir Richard Steele, in compliment to the Earl of Orrery, for whom one of the first machines was made.] A piece of apparatus designed to illustrate, by the revolution of small balls mounted on rods and moved by wheel-work, the relative size, periodic motions, positions, orbits, &c., of the bodies of the solar system, or of a part of them; a planetarium. Barlow.