geosphere

The geosphere is the scientific name for the solid parts of a planet. When you go for a hike, you can think of the ground beneath your feet as part of the Earth's geosphere.

In Earth science or geoscience, the geosphere refers to the parts of our planet that are solid (like the mantle and crust). The liquid and gaseous parts are called the hydrosphere and atmosphere. Geosphere, coined in the late 19th century, was modeled after atmosphere, with the Greek prefix geo-, "earth."

Definitions of geosphere
  1. noun
    the solid part of the earth consisting of the crust and outer mantle
    synonyms: lithosphere
    see moresee less
    type of:
    layer
    a relatively thin sheetlike expanse or region lying over or under another
Word Family
EDITOR’S CHOICE

Test prep from the experts

Boost your test score with programs developed by Vocabulary.com’s experts.

  • Proven methods: Learn faster, remember longer with our scientific approach.
  • Personalized plan: We customize your experience to maximize your learning.
  • Strategic studying: Focus on the words that are most crucial for success.

SAT/PSAT

$29.95
  • Number of words: 500+
  • Duration: 8 weeks or less
  • Time: 1 hour / week

TOEFL

$29.95
  • Number of words: 500+
  • Duration: 10 weeks or less
  • Time: 1 hour / week

ACT

$29.95
  • Number of words: 700+
  • Duration: 10 weeks
  • Time: 1 hour / week