1) Astronomical instrument 2) Celestial navigation
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https://www.crosswordclues.com/clue/almucantar
An almucantar (also spelled almucantarat or almacantara) is a circle on the celestial sphere parallel to the horizon. Two stars that lie on the same almucantar have the same altitude. The term was introduced into European astronomy by monastic astronomer Hermann Contractus of Reichenau, from the Arabic word al-muqntarat, meaning `crooked, bow-lik....
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http://en.wikipedia.org/wiki/Almucantar
• (n.) A small circle of the sphere parallel to the horizon; a circle or parallel of altitude. Two stars which have the same almucantar have the same altitude. See Almacantar.
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http://thinkexist.com/dictionary/meaning/almucantar/
in astronomy, any circle of the celestial sphere parallel to the horizon; when two objects are on the same almucantar, they have the same altitude. ... [1 related articles]
Found on
http://www.britannica.com/eb/a-z/a/51
<astronomy> A small circle of the sphere parallel to the horizon; a circle or parallel of altitude. Two stars which have the same almucantar have the same altitude. See Almacantar. Almucanter staff, an ancient instrument, having an arc of fifteen degrees, formerly used at sea to take observations of the sun's amplitude at the time of its risi...
Found on
http://www.encyclo.co.uk/local/20973
Al`mu·can'tar noun [ French
almucantarat ,
almicantarat , ultimately from Arabic
al- muqantarāt , plural, from
qantara to bend, arch.]
(Astron.) A small circle of the sphere parallel to the horizon; a circle or parallel of altitude. Two stars which have the sa...
Found on
http://www.encyclo.co.uk/webster/A/61
a circle on the celestial sphere parallel to the horizon; the locus of all points of a given altitude. Also called
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https://www.infoplease.com/dictionary/almucantar
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