Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun The geology of celestial bodies.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun astronomy, geology The science dealing with the structure and composition of planets and other bodies in the solar system.

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

astro- +‎ geology

Examples

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