armillary sphere

(redirected from Armil)
Also found in: Dictionary, Thesaurus, Wikipedia.

armillary sphere

(ar -mă-lair-ee) A device, dating back to antiquity, composed of a set of graduated rings representing circles on the celestial sphere, such as the ecliptic, celestial equator, and colures. The whole globe often revolved about an axis – the polar axis – within horizon and meridian circles. Movable sighting adjustments enabled a star to be observed and its coordinates to be read off the relevant circles.
Enlarge picture
An illustration of the type of armillary sphere used by the great scientist Tycho Brahe. Reproduced by permission of Fortean Picture Library.

Armillary Sphere

(religion, spiritualism, and occult)

An armillary (from Latin word armilla, meaning “bracelet”) sphere is a skeletal sphere consisting of rings that represent the more important celestial circles utilized by astrologers—the ecliptic, the meridian, the horizon, the celestial equator, etc.