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almucantar 高度方位仪 高度方位仪 Almucantar \ Al` mu* can" tar\, n. [ F. almucantarat, almicantarat, ultimately fr. Ar. al- muqantar[= a] t, pl., fr. 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 same almucantar have the same altitude. See { Almacantar}. [ Archaic] [ 1913 Webster] { 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 rising or setting, to find the variation of the compass. [ 1913 Webster]
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