panspermy Meaning, Definition & Usage

Pan"sper`my noun
Etymology
Pan- + Gr. a seed.
Definitions
  1. (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 spontaneous generation.

Webster 1913