A small round granule of extraterrestrial origin found embedded in some meteorites.
The measurement is complicated by the presence of a component due to fast and high-energy neutrons of extraterrestrial origin.
The array's 20-foot-wide telescopes, spread across several acres, don't send messages into space but scan the cosmos for signals of extraterrestrial origin.
Typically, witnesses who take the trouble to report a sighting consider the object to be of extraterrestrial origin or possibly a military craft but certainly under intelligent control.
an (apparently) flying object whose nature is unknown; especially those considered to have extraterrestrial origins.
