extraterrestrial
CEFR: C1
Originating, existing, or occurring outside the Earth or its atmosphere, particularly regarding potential biological life forms or cosmic matter.
SPELLING TRAP: Note the double 'r' in '-terr-': e-x-t-r-a-t-e-r-r-e-s-t-r-i-a-l.
Common Collocations
- extraterrestrial life
- extraterrestrial intelligence
- extraterrestrial origin
Example Sentence
Astrobiologists analyze Martian subsoil samples for microbial biosignatures of extraterrestrial life.