armillarysphere

ar·mil·lar·y sphere (ärʹmə-lĕr'ē, är-mĭlʹə-rē) n.

An old astronomical model with solid rings, all circles of a single sphere, used to display relationships among the principal celestial circles.

  [Translation of French sphère armillaire, from Latin armilla, bracelet, from armus, shoulder. See ar-.

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