geoid
/ˈdʒiːɔɪd
/noun (the geoid)
A hypothetical solid figure whose surface corresponds to mean sea level and its imagined extension under (or over) land areas.The geoid is a hypothetical surface, on which the gravitational pull of the Earth is the same everywhere....
- The seven-year odyssey transformed the world in earnest by giving to science a new form for the globe - that irregular spheroid today called the geoid.
- ‘Now, we're ready to look at how the geoid varies over short periods of time,’ he adds.
Origin
Late 19th century: from Greek geoeidēs, from gē 'earth' + -oeidēs (see -oid).
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