The branch of applied mathematics concerned with measuring, or determining the shape of, the earth or a large part of its surface, or with locating points on its surface with precision.
Webster's New World
Origin of Geodesy
From French géodésie, from Medieval Latin geōdaesia, from Ancient Greek γεωδαισία (geōdaisía), from γῆ (gē, “earth”) + δαίω (daíō, “to divide”).
New Latin geōdaesia from Greek geōdaisiā geō- geo- daiesthai to divide dā- in Indo-European roots
From American Heritage Dictionary of the English Language, 5th Edition
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