Armil
Pronunciation : Ar"mil
Part of Speech : n.
Etymology : [L. armilla a bracelet, fr. armus arm: cf. OF. armille.]
Definition : 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.
Source : Webster's Unabridged Dictionary, 1913