astrogeology: Meaning and Definition of

as•tro•ge•ol•o•gy

Pronunciation: (as"trō-jē-ol'u-jē), [key]
— n.
  1. the science dealing with the structure and composition of planets and other bodies in the solar system.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.