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quadrantal Definition
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quadrantal
noun(quad-rant)an instrument for measuring altitudes consisting commonly of a graduated arc of 90 degrees with an index or vernier and usually having a plumb line or spirit level for fixing the vertical or horizontal direction
quadrantal
noun(quad-rant)a device or mechanical part shaped like or suggestive of the quadrant of a circle
quadrantal
noun(quad-rant)an arc of 90 degrees that is one quarter of a circle