出典:Wiktionary
From an interview given by amateur pilot Kenneth Arnold who described seeing nine flying objects that were "moving like saucers being skimmed across a lake". The description was not meant to describe the shape of the objects, only how they maneuvered, yet the misinterpretation took hold and gained popularity.
flying saucer (複数形 flying saucers)
飛び散る.
the fly-trap
an air-looper
a birdman
an air-fleet
a seaplance-tender
a flying saucer