ge·oid (j  oid )n. The hypothetical surface of the earth that coincides everywhere with mean sea level. [German, from Greek geoeid s, earthlike : g, earth + -oeids, -oid.]ge·oid al (-oidl) adj. |
geoid [ˈdʒiːɔɪd]
n
1. (Earth Sciences / Geological Science) a hypothetical surface that corresponds to mean sea level and extends at the same level under the continents
2. (Earth Sciences / Physical Geography) the shape of the earth
| geoid (joid) The hypothetical surface of the Earth that coincides everywhere with mean sea level and is perpendicular, at every point, to the direction of gravity. The geoid is used as a reference surface for astronomical measurements and for the accurate measurement of elevations on the Earth's surface. |
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