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Pronunciation varies by accent · noun
An advocate of panspermism; one who believes that life on Earth originated in outer space..
Use panspermist when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Panspermist means An advocate of panspermism; one who believes that life on Earth originated in outer space..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use panspermist where its definition matches the intended context.
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