First Known Use: 1664
Dictionary
armillary sphere
noun ar·mil·la·ry sphere \ˈär-mə-ˌler-ē-, är-ˈmi-lə-rē-\
Definition of ARMILLARY SPHERE
: an old astronomical instrument composed of rings showing the positions of important circles of the celestial sphere
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Origin of ARMILLARY SPHERE
French sphère armillaire, from Medieval Latin armilla, from Latin, bracelet, iron ring, from armus shoulder — more at arm
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