Meaning & use
regolith
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A layer of loose, fragmented rock, dust, and soil covering solid bedrock, found on Earth, the Moon, and other planetary bodies.
See it in a sentence
Astronauts collected samples of lunar regolith during the mission.
Wind and water slowly break down bedrock into regolith over long periods of time.
A note on using this word
Common in geology and planetary science, "regolith" is often used specifically when discussing the Moon or Mars, distinguishing it from Earth's more familiar "soil."
Words with an opposite meaning
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