panspermia in British English
(pænˈspɜːmɪə), panspermism (pænˈspɜːmɪzəm), panspermatism (pænˈspɜːməˌtɪzəm) or panspermy (pænˈspɜːmɪ)
nouna 19th-century evolutionary theory that precursors to life exist in space and will develop on finding suitable conditions