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quadrantOne entry found. Main Entry: quad·rant Pronunciation: \ˈkwä-drənt\ Function: noun Etymology: Middle English, from Latin quadrant-, quadrans fourth part; akin to Latin quattuor four — more at four Date: 15th century 1 a : 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 b : a device or mechanical part shaped like or suggestive of the quadrant of a circle — qua·dran·tal \kwä-ˈdran-təl\ adjective
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