armillary sphere
English
![](http://upload.wikimedia.org/wikipedia/commons/thumb/3/36/Armillary_sphere_escorial.jpg/220px-Armillary_sphere_escorial.jpg)
Noun
armillary sphere (plural armillary spheres)
- An instrument consisting of graduated metal circles used to represent the motions of celestial bodies around the earth.
Translations
instrument consisting of graduated metal circles
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