Panspermy
Pronunciation : Pan"sper`my
Part of Speech : n.
Etymology : [Pan- + Gr. (Biol.) (a) The doctrine of the widespread distribution of germs, from which under favorable circumstances bacteria, vibrios, etc., may develop. (b) The doctrine that all organisms must come from living parents; biogenesis; -- the opposite of
Source : Webster's Unabridged Dictionary, 1913