panspermia(redirected from panspermy)
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The theory that microorganisms or biochemical compounds from outer space are responsible for originating life on Earth and possibly in other parts of the universe where suitable environmental conditions exist.
[Greek panspermiā, mixture of all seeds : pan-, pan- + sperma, seed; see sperm1.]
(Philosophy) a 19th-century evolutionary theory that precursors to life exist in space and will develop on finding suitable conditions