Full of craters; heavily cratered or marked with many crater-like formations.
From crater + -ous (Latin suffix meaning 'full of' or 'characterized by'). This suffix appears in words like dangerous, famous, and gorgeous.
The most craterous bodies in our solar system are the ancient moons and asteroids that have been pummeled by billions of years of impacts, making them look almost sponge-like when examined closely.
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