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Definition of Panspermia
1. Noun. The hypothesis that microorganisms may transmit life from outer space to habitable bodies; or the process of such transmission. ¹
¹ Source: wiktionary.com
Medical Definition of Panspermia
1. The hypothetical doctrine of the omnipresence of minute forms and spores of animal and vegetable life, thus accounting for apparent spontaneous generation. Origin: pan-+ G. Sperma, seed (05 Mar 2000)