Meaning & use
astrobiologist
A scientist who studies the possibility and nature of life elsewhere in the universe.
See it in a sentence
The astrobiologist analyzed samples from Mars for signs of ancient microbial life.
As an astrobiologist, she spends much of her time studying extreme environments on Earth.
A note on using this word
Astrobiology combines biology, chemistry, geology, and astronomy, so astrobiologists often collaborate across several scientific fields.
Words with a similar meaning
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