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Armil

Source : Webster's Revised Unabridged Dictionary (1913)

Armil \Ar"mil\, n. [L. armilla a bracelet, fr. armus arm: cf.
   OF. armille.]
   1. A bracelet. [Obs.]

   2. An ancient astronomical instrument.

   Note: When composed of one ring placed in the plane of the
         equator for determining the time of the equinoxes, it
         is called an equinoctial armil; when of two or more
         rings, one in the plane of the meridian, for observing
         the solstices, it is called a solstitial armil.
         --Whewell.
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