American Dictionary of the English Language

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AL'MUCANTAR, noun A series of circles of the sphere passing through the center of the sun, or of a star, parallel to the horizon. It is synonymous with a parallel of altitude, whose common zenith is the vertical point.

ALMUCANTAR'S STAFF. An instrument of box or pear-tree, having an arch of fifteen degrees, used to take observations of the sun, about the time of its rising or setting, to find the amplitude and the variations of the compass.