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almucantar

[ al-myoo-kan-ter ]

noun

, Astronomy.
  1. a circle on the celestial sphere parallel to the horizon; the locus of all points of a given altitude.


almucantar

/ ˌælməˈkæntə /

noun

  1. a circle on the celestial sphere parallel to the horizontal plane
  2. an instrument for measuring altitudes
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word History and Origins

Origin of almucantar1

1350–1400; probably < Medieval Latin almucantarath < Arabic al-muqanṭarāt the almucantars, equivalent to al the + muquanṭarāt sundial, derivative of qanṭarah arch; replacing almicanter, Middle English almicanteras (plural) < Middle French almicantarath < Medieval Latin
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Word History and Origins

Origin of almucantar1

C14: from French, from Arabic almukantarāt sundial
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Example Sentences

Two stars which have the same almucantar have the same altitude.

Curiously enough Dr. Küstner, in his determination of the aberration from a series of observations coincident in time with those of the Almucantar, came upon similar anomalies, and his results, published in 1888, furnish a counterpart to those which I had pointed out in 1885.

The verification afforded by the recent parallel determinations at Berlin, Prague, Potsdam, and Pulkowa, which show a most surprising and satisfactory accordance, as to the character of the change, in range and periodicity, with the Almucantar results, has led me to make further investigations on the subject.

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