exterrestrial

comparative more exterrestrial · superlative most exterrestrial

1. Synonym of extraterrestrial.

   Are terrestrial organisms accidently^([sic]) landed on an exterrestrial surface likely to survive and be detected inadvertently by our life detection experiments and are terrestrial organisms likely to grow and destroy indigenous life forms?

   1969, United States. Congress. House. Appropriations, Independent Offices and Department of Housing and Urban Development Appropriations for 1970, page 909

   Synonyms: extraterrestrial