noun
flying object; projectile
Technical term for any object flying through the air, especially rockets, missiles, or other projectiles. Often used in news or military contexts.
北朝鮮が飛翔体を発射したと報じられた。
It was reported that North Korea launched a projectile.
このレーダーは小型の飛翔体も探知できる。
This radar can detect even small flying objects.
飛行物体 is a more general term for 'flying object', often used in UFO contexts, while 飛翔体 is more technical and often implies a projectile or launched object.
Compound of 飛翔 (ひしょう, 'flight, flying') and 体 (たい, 'body, object'). The kanji 翔 means 'soar' or 'fly', and the word is a modern technical coinage.