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词汇 geoid
释义

Definition of geoid in English:

geoid

noun ˈdʒiːɔɪdˈdʒiɔɪd
the geoid
  • A hypothetical solid figure whose surface corresponds to mean sea level and its imagined extension under (or over) land areas.

    大地水准面,地球体

    Example sentencesExamples
    • The geoid is a hypothetical surface, on which the gravitational pull of the Earth is the same everywhere.
    • ‘We live on the crust, so we don't really notice the deviation from what would be sort of the normal form of the geoid,’ he said.
    • 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.
    • To this end we used an integrated modelling technique that combines several regional geophysical observables (elevation, gravity, geoid and heat flow) with available seismic data.
    • ‘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 'earth' + -oeidēs (see -oid).

Definition of geoid in US English:

geoid

nounˈdʒiɔɪdˈjēoid
the geoid
  • The hypothetical shape of the earth, coinciding with mean sea level and its imagined extension under (or over) land areas.

    大地水准面,地球体

    Example sentencesExamples
    • To this end we used an integrated modelling technique that combines several regional geophysical observables (elevation, gravity, geoid and heat flow) with available seismic data.
    • 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.
    • ‘We live on the crust, so we don't really notice the deviation from what would be sort of the normal form of the geoid,’ he said.
    • The geoid is a hypothetical surface, on which the gravitational pull of the Earth is the same everywhere.
    • ‘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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