geognosy

/dʒiˈɑɡnəsi/
noun
  1. The scientific study of the Earth's structure, composition, and physical features; an older term for geology.
    • In the 19th century, geognosy was the main way scientists studied the Earth's crust.
    • Modern geognosy uses advanced tools like seismic imaging to map underground formations.
    • His book on geognosy described the layers of rock beneath the continent.
Synonyms
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