Armil definition

(obsolete) A bracelet.
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(obsolete) An ancient astronomical instrument, having either one ring placed in the plane of the equator for determining the time of the equinoxes (an equinoctial armil) or two or more rings, one in the plane of the meridian, for observing the solstices (a solstitial armil).

noun
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Other Word Forms

Noun

Singular:
armil
Plural:
armils

Origin of armil